Rev. Dr. Martin Luther King, Jr.’s Zettelkasten

It looks like the Rev. Dr. Martin Luther King, Jr. was using several Weis No. 35 card index boxes, of which a very similar version is still commercially available on Amazon from Globe-Weis/Pendaflex.

I’ve tracked down where most of his card index is hiding at Morehouse College, but it doesn’t appear to be digitized in any fashion. Interested researchers can delve into the Morehouse College Martin Luther King, Jr. Collection: Series 4: Research Notes, Collection Identifier: 0000-0000-0000-0131i 

The following seems to be the bulk of where MLK’s zettelkasten is maintained, in particular:

Who wants to make a road trip to Atlanta to look at some of the most influential index cards of the 20th century?!!

Jillian Hess has recently written a few short notes on MLK’s nachlass and note taking for those interested in some additional insight as well as an example of a quote on one of his 1953 note cards on Amos 5: 21-24 making it into his infamous speech “Normalcy, Never Again” (aka the “I Have a Dream” speech).

I frequently hear students ask if maintaining a zettelkasten for their studies is a worthwhile pursuit. Historically, it was one of the primary uses of the tool, and perhaps this example from one of the 20th century’s greatest orators’ doctoral work at Boston University dating from roughly 1952-1955 will be inspiring. 

A quick survey of academics, teachers, and researchers blogging about note taking practices and zettelkasten-based methods

Frequently newcomers to the note taking space or one of the many tools used within it are curious to see others who are using these methods and writing or blogging about them in public. Because many are students (often undergraduates, masters, or Ph.D.) looking for practical advice, tips, or even public examples which they might follow, I thought I’d put together a quick list focusing on academic use-cases from my own notes.

Individuals

Dan Allosso is a history professor at Bemidji State University who has used Obsidian in his courses in the past. He frequently writes about reading, writing, and research process on his Substack channels or in videos archived on his YouTube channel. In addition to this, Dan has a book on note taking and writing which focuses on using a card index or zettelkasten centric process. Much of his personal use is grounded both in index cards as well as Obsidian.

Shawn Graham has both a blog as well as a prior course on the history of the internet using Obsidian. In the course materials he has compiled significant details and suggestions for setting up an Obsidian vault for students interested in using the tool.

Kathleen Fitzpatrick has a significant blog which covers a variety of topics centered around her work and research. Her current course Peculiar Genres of Academic Writing (2024) focuses on writing, note taking (including Zettelkasten) and encourages students to try out Obsidian, which she’s been using herself. A syllabus for an earlier version of the course includes some big name bloggers in academia whose sites might serve as examples of academic writing in the public. The syllabus also includes a section on being an academic blogger and creating platform as a public intellectual.

Morganeua is a Ph.D. candidate who has a popular YouTube channel on note taking within the academic setting (broadly using Obsidian, though she does touch on other tools from time to time).

Chris Aldrich is independent research who does work at the intersection of intellectual history and note taking methods and practices. He’s got an active website along with a large collection of note taking, zettelkasten, commonplace books, and sense-making related articles. His personal practice is a hybrid one using both analog and digital methods including Obsidian, Hypothes.is, and his own website.

Bob Doto is a teacher and independent researcher who focuses on Luhmann-artig zettelkasten practice and writing. He uses Obsidian and also operates a private Discord server focused on general Zettelkasten practice.

Manfred Kuehn, a professor of philosophy at Boston University, had an influential blog on note taking practices and culture from 2007 to 2018 on Blogspot. While he’s taken the site down, the majority of his work there can be found on the Internet Archive.

Andy Matuschak is an independent researcher who is working at the intersection of learning, knowledge management, reading and related topics. He’s got a PatreonYouTube Channel and a self- built public card-based note collection.

Broader community-based efforts

Here are some tool-specific as well as tool-agnostic web-based fora, chat rooms, etc. which are focused on academic-related note taking and will have a variety of people to follow and interact with.

Obsidian runs a large and diverse Discord server. In addition to many others, they have channels for #Academia and #Academic-tools as well as #Knowledge-management and #zettelkasten.

Tinderbox hosts regular meetups (see their forum for details on upcoming events and how to join). While their events are often product-focused (ways to use it, Q&A, etc.), frequently they’ve got invited speakers who talk about their work, processes, and methods of working. Past recorded sessions can be found on YouTube. While this is tool-specific, much of what is discussed in their meetups can broadly be applied to any tool set. Because Tinderbox has been around since the early 00s and heavily focused on academic use, the majority of participants in the community are highly tech literate academics whose age skews to the over 40 set.

A variety of Zettelkasten practitioners including several current and retired academicians using a variety of platforms can be found at https://forum.zettelkasten.de/.

Boris Mann and others held Tools for Thought meetups which had been regularly held through 2023. They may have some interesting archived material for perusal on both theory, practice, and a wide variety of tools.

Others?

I’ve tried to quickly “tip out” my own zettelkasten on this topic with a focus on larger repositories of active publicly available web-based material with an academic use-case focus. Surely there is a much wider variety of people and resources not listed here, but it should be a reasonable primer for beginners. Feel free to reply with additional suggestions and resources of which you may be aware.

Useful books, articles, and miscellaneous manuals

While many may come to the space by way of Sönke Ahrens’ 2017 book, we should all acknowledge that many of these methods go back centuries, so there is obviously lots of prior art to look at for hints and tricks. There is enough that for many students, you may be able to find a note taking guide written by a famous luminary in your own chosen field of study (especially if you’re in the humanities and studying history, anthropology, or sociology.)

Recommended reading

To help students get up to speed most quickly, based on my own experience and reading I often recommend reading the following (roughly in order) along with one or more of the note taking manuals below (of which I personally most appreciate Umberto Eco, Gerald Weinberg, Jacques Goutor, John Locke, Dan Allosso and S.F. Allosso, and Antonin Sertillanges.)

  • Adler, Mortimer J. “How to Mark a Book.” Saturday Review of Literature, July 6, 1940. https://www.unz.com/print/SaturdayRev-1940jul06-00011/
  • Adler, Mortimer J., and Charles Van Doren. How to Read a Book: The Classical Guide to Intelligent Reading. Revised and Updated ed. edition. 1940. Reprint, Touchstone, 2011.
  • Thomas, Keith. “Diary: Working Methods.” London Review of Books, June 10, 2010. https://www.lrb.co.uk/the-paper/v32/n11/keith-thomas/diary
  • Mills, C. Wright. “On Intellectual Craftsmanship (1952).” Society 17, no. 2 (January 1, 1980): 63–70. doi.org/10.1007/BF02700062
  • “They Say / I Say”: The Moves That Matter in Academic Writing. 3rd ed. 2006. Reprint, New York: W. W. Norton & Company, 2014.

Bibliography of Note Taking Manuals

On Cohesion and Coherence of the Zettelkasten: Where Does the Work Reside?

While discussing Chris Rock’s zettelkasten and the related version of Eminem‘s, Sascha Fast argues against them being zettelkasten:

To assume, that Eminem had a Zettelkasten because he had slips and a box is the same assuming that people are just sacks full of meat. The mere presence of parts is not enough to assume that there is a whole.
You can borrow the terms from linguistics: You need cohesion for the formal wholeness of your Zettelkasten (links, separate notes, etc.) and to have a good Zettelkasten, you need coherence (the actual connections between ideas). Eminem’s box has neither cohesion nor coherence. It is almost the perfect example of what a Zettelkasten is not in the presence of its parts. 

The key questions at play here are where is the work of a keeping a zettelkasten done and how is represented? Where is the coherence held? Is the coherence even represented physically? Does it cohere in the box or elsewhere?

The desk in my office (and that of countless others’) can appear to be a hodgepodge of stacks of paper and utter mess. Some might describe it as a disaster area and wonder how I manage to get any work done. However, if asked, I can pull out the exact book, article, paper, or other item required from any of the given piles. This is because internally, I can remember what all the piles represent and, within a reasonable margin of error, what is in each and almost exactly where it is at, or even if it’s filed away in another room. Others, who have no experience with my internal system would be terrifyingly lost in a morass of paper. The system represented by my desk is an extension of my mind, but one which doesn’t need to be directly labeled, classified, or indexed for it to operate properly in my life and various workflows. One could say that the loose categorization of piles is the lowest level of work I could put into the system for it to still be useful for me. However, to those on the outside, this work appears to be wholly missing as they don’t have access to the information and experiences with it that are held only in my brain.

By direct analogy, I suspect that Eminem’s zettelkasten, and that of many others, follows this same pattern. They neither require internal “cohesion nor coherence” in their systems which are direct extensions of their minds where that cohesion and coherence are stored. As far back as Andreas Stübel (1684), many (including Niklas Luhmann) have used variations of the idea “secondary memory” to describe their excerpting and note taking practices. [1][2]  Many in the long tradition of ars excerpendi have created piles of slips which held immense value for them. So much so that they would account for them in their wills to give to others following their deaths. In many cases, these piles were wholly useless to their recipients because they were missing all of the context in which they were made and why. Lacking this context, they literally considered them scrap heaps and often unceremoniously disposed of them.

In the case of Niklas Luhmann’s zettelkasten, he spent the additional time and work to index and file his notes thereby making them more comprehensible and possibly of more direct use to people following his death. For his working style and needs, he surely benefited from this additional work, particularly when taken over the longer horizon of his zettelkasten’s “life” compared to others’.  However, it’s not always the case that others will have those same needs. Some may only want or need to keep theirs for the length of their undergraduate or graduate school careers. Others may use them for short projects like articles or a single book. This doesn’t mean that there isn’t coherence, it may just be held in their memories for the length of time for which they need it. Those who have problems with longer term memory for things like this may be well-advised to follow Luhmann’s example, particularly when they’re working at problems for career-long spans.

In Eminem’s case, given the shape and size of his collection, which includes various sizes, types, and colors of paper and even different pen colors, it may actually be easier for him to have a closer visual relationship with his notes in terms of finding and using them. (“Yes, that’s the scrap I wrote for 8 Mile while I was at that hotel in Paris. Where is the blue envelope with the doggerel I wrote for my daughter?”) It’s also possible that for his creative needs, sifting through bits and pieces may spark additional creative work in addition to the slips of work he’s already created. Cohesion and coherence may not exist in his notes for us as distant viewers of them, but this doesn’t mean that they do not exist for him while using his box of notes.

As an even more complex example, we might look at the zettelkasten of S.D. Goitein. His has a form closer to that of the better known commonplacing practices of Robert Greene and Ryan Holiday. While Goitein had a collection of only 27,000 notes (roughly a third of Luhmann’s), he had a significantly larger written output of books and articles than Luhmann. Additionally, Goitein’s card index has been scanned and continues to circulate amongst scholars in his areas of expertise by means of physical copies rather than a digitized repository the way that Luhmann’s has over the past decade. Despite Goitein’s notes not having the same level of direct cohesion or coherence as Luhmann’s, I suspect that far more researchers are actively and profitably using Goitein’s collection today than are using Luhmann’s.

For those who are more visually inclined, an additional example of the hidden work of cohesion and coherence can be seen in the example of Victor Margolin.

In this case, Margolin is certainly actively creating both cohesion and coherence. The question is where does it reside? Certainly, like many of us, some of it resides internally in his mind and in coordination with the extension of it represented in his note cards, but as he progresses in his work, much of it goes into his larger outlines drawn out on A2 paper, and ultimately accretes into the writing that appears in the final version of his book World History of Design.

As described in his video, Margolin doesn’t appear to be utilizing his slips as lifelong tools for other potential projects, nor is he heavily indexing or categorizing them the way Luhmann and others have done. This doesn’t make his zettelkasten any less valuable to him, it only changes where the representation of the work is located.

Naturally, for those with lifelong uses of and needs for a zettelkasten, it may make more sense for them to put the work into it in such a way that it appears more cohesive and coherent to external viewers as well as for their future selves, but the variety of methods in the broader tradition, make it fairly simple for individual users to pick and choose where they’d personally like to store representations of their work. If you’re like philosopher Gilles Deleuze[3] who said in L’Abécédaire 

And everything that I learn, I learn for a particular task, and once it’s done, I immediately forget it, so that if ten years later, I have to–and this gives me great joy—if I have to get involved with something close to or directly within the same subject, I would have to start again from zero, except in certain very rare cases… 

then perhaps you may wish to have better notes with the work cohered directly to, in, and between your cards? Surely Deleuze didn’t start completely from scratch each time because in reality, he had a lifetime’s worth of experience and study to draw from, but he still had to start from what he could remember and begin writing, arguing, and working from there.

This is why having a lifelong zettelkasten practice is more productive for most: it acts as a knowledge ratchet to prevent having to start from scratch by staring at a blank piece of paper. The benefit is that—based on your personal abilities and preferences—you can start somewhere simple and build from there.

Finally, I’ll mention that in Paper Machines, Markus Krajewski calls Joachim Jungius’ the “first practitioner of nonhierarchical indexing”. In talking about the idiosyncratic nature of Jungius’ zettelkasten for which “There are no aids for access, no apparatus; neither signatures nor a numbering of the cards, neither registers nor indexes, let alone referential systems that guide one to the building blocks of knowledge.” he says[4]:

The architecture of the idiosyncratic scholar’s machine requires no mediation for, or access by, others. In dialog with the machine, an intimate communication is permitted. Only the close and confidential dialog results in the connections that lead an author to new texts. When queried by the uninitiated, the box of paper slips remains silent. It is literally a discreet/discrete machine. 

If this is the case, then Marshall Mathers is surely channeling Jungius’ practices, as I suspect that many are. 

Perhaps in The Merchant of Venice, Shakespeare may have just as profitably written: 

Tell me where is knowledge bred?
Or in the box or in the head?

Photo still from Willy Wonka (Warner Bros.,, 1971) with Gene Wilder as Willy Wonka in the center looking away wistfully and Grandpa Joe and Mike TV's mom flanking him with quizzical looks. Underneath is the meme quote: "Where is knowledge bred? In the box or in the head?"
Willy Wonka and the Chocolate Factory (Warner Bros., 1971) a zettelkasten meme.

References

[1] Cevolini, Alberto. “Where Does Niklas Luhmann’s Card Index Come From?” Erudition and the Republic of Letters 3, no. 4 (October 24, 2018): 390–420 (401). https://doi.org/10.1163/24055069-00304002.
 
[2] Andreas M. Stübel, Exercitatio academica de excerptis adornandis (Leipzig, 1684), 33.
 
[3] Incidentally, Deleuze has written quite a bit about the concept of a body without organs, which is also relevant to the broader thinking and knowledge space.
 
[4] Krajewski, Markus. Paper Machines: About Cards & Catalogs, 1548-1929. Translated by Peter Krapp. History and Foundations of Information Science. MIT Press, 2011. https://mitpress.mit.edu/books/paper-machines. pp. 50-51.
Replied to Chris Rock's zettelkasten output process by thread by Chris, Andy, Sascha (Zettelkasten Forum)
Chris is going to keep insisting that any set of slips is a Zettelkasten, and Sascha is going to keep insisting that a Zettelkasten is a cohesive and coherent system.

My impression is that human brains are very much of a pattern, that under the same conditions they react in the same way, and that were it not for tradition, upbringing, accidents of circumstance, and particularly of accidental individual obsessions, we should find ourselves—since we all face the same universe—much more in agreement than is superficially  apparent. We speak different languages and dialects of thought and can even at times catch ourselves flatly contradicting one another in words while we are doing our utmost to express the same idea. How often do we see men misrepresenting one another in order to exaggerate a difference and secure the gratification of an argumentative victory!
—H. G. Wells, “The Idea of a World Encyclopedia.” Harper’s Magazine, April 1937. https://harpers.org/archive/1937/04/the-idea-of-a-world-encyclopedia/.

I’ll agree with Wells that most of our difference here is nitpicking for the sake of argument itself rather than actual meaning.

Because we’re in a holiday season, I’ll use our holiday traditions to analogize why I view things more broadly and prefer the phrase “zettelkasten traditions”. Much of Western society uses the catch-all phrase “Happy Holidays” to subsume a variety of specific holidays encompassing Christmas, Hannukah, New Years, Kwanzaa, and some even the comedically invented holiday of Festivus (“for the rest of us”). Each of these is distinct in its meaning and means of celebration, but each also represents a wide swath of ideas and means of celebration. Taking Christmas as an example: Some celebrate it in a religious framing as the birth of Christ (though, in fact, there is no solid historical attestation for the day of his birth). Some celebrate it as an admixture of Christianity and pagan mid-winter festivities which include trees, holly, mistletoe, lights, a character named Santa Claus, and even elves and reindeer which wholly have nothing to do with Jesus. Some give gifts and some don’t. Some put up displays of animals and mangers while others decorate with items from a 2003 New Line Cinema film starring Will Farrell. Some sing about a reindeer with a red nose created in 1939 as an inexpensive advertising vehicle in a coloring book. Almost everyone differs wildly in both the why and how they choose to celebrate this one particular holiday. The majority choose not to question it, though some absolutists feel that the Jesus-only perspective is what defines Christmas. 

I have only touched on the other holidays, each of which has its own distribution of ideas, beliefs, and means of celebration. And all of these we wrap up in an even broader phrase as “Happy Holidays” to inclusively capture them all. Collectively we all recognize what comprises them and defines them, generally focusing on what makes them mean something to us individually. Less frequently do we focus in on what broadly defines them in aggregate because the distribution of definitions is so spectacularly broad. Culturally trying to create one and only one definition is a losing proposition, so why bother beyond attributing the broader societal definitions, which assuredly will change and shift over time. (There was certainly a time during which Christmas was celebrated without any trees or carols, and a time after which there was.)

Zettelkasten traditions have a similar very broad set of definitions and practices, both before Herr Luhmann and after. Assuredly they will continue to evolve. One can insist their own personal definition is the “true one”, while others are sure to insist against it. Spending even a few moments reading almost anything about zettelkasten, one is sure to encounter half a dozen versions. I quite often see people (especially in the Obsidian space) say that they are keeping a zettelkasten, when on a grander scheme of distributions in the knowledge management space, what they’re practicing is far closer to a digital commonplace book than something Luhmann would recognize as something built on his own model, which itself was built on a card index version of a commonplace book, though in his case, one which prescribed a lot of menial duplication by hand. The idiosyncratic nature of the varieties of software and means of making a zettelkasten is perforce going to make a broad definition of what it is. Neither Marshall Mathers nor Chris Rock are prone to call their practices zettelkasten—primarily because they speak English—but they would both very likely recognize the method as a close variation to what they’ve been doing all along. 

Humankind has had various instantiations of sense making, knowledge keeping, and transmission over the millennia classified under variations of names from talking rocks, menhir, songlines, Tjukurpa, standing stones, massebah, henges, ars memoria, commonplaces, florilegia, commonplace books, card indexes, wikis, zettelkasten and surely thousands of other names. While they may shift about in their methods of storage, means of operation, and the amount of work both put into them as well as value taken out, they’re part of a broader tradition of human sense making, learning, memory, and creation that brings us to today. 

Perhaps it’s worth closing with a sententia from Terence‘s (161 BC), comedy Phormio (line 454)? 

Quot homines tot sententiae: suo’ quoique mos.

Translation: “There are as many opinions as there are people who hold them: each has his own correct way.” Given the limitations of the Latin and the related meanings of sententiae, one could almost be forgiven for translating it as “zettelkasten”… Perhaps we should consult the zettelkasten that is represented by the Thesaurus Linguae Latinae?

Replied to Micro.blog Analog Tools Meetup by cygnoircygnoir (cygnoir.net)
Nearly two years later, I’m reviving the idea of a Micro.blog meetup for analog tools like paper and notebooks, pens and ink, pencils, stationery, planners and journals, typewriters, index cards, etc. Thirteen intrepid fans of analog tools filled out the survey last time, and the majority thought a one-hour Zoom meeting each month would be the best way to start. Timing is everything, in so many realms, and this one is no different. I’m available to host this meetup every third Saturday of the month from 9-10 a.m. PST. That would make our first meetup on Saturday, January 20th.
Typed index card that reads: "@cygnoir:
I'm all in for this! Let me know the zoom details when it's set.
Thanks for taking the initiative for setting this up for the community.
Bestest, @chrisaldrich" 
Followed by a signature . On top of the index card is a demonstrator fountain pen.

FireKing Index Card Filing Cabinet: Rock Solid Zettelkasten Storage for Under 10¢ per card

I’ve just run across what must be one of the largest and most impressive currently manufactured card index filing cabinets on the planet:

FireKing Card, Check & Note File Cabinet, 6 Drawers (6-2552-C)

FireKing International manufactures a 1-hour fire protection filing cabinet with index card inserts, that has options for various locks, is rated for 30 foot drops, and is sealed against potential water damage. They offer both four and six drawer options with the larger clocking in at a massive 863 pounds. With each of the 18 sections on the 6 drawer model capable of 25 15/16″ of storage, this beast should hold about 64,800 index cards.

The rough news is that this king of cabinets, while providing great protection and security for your zettelkasten, runs a fairly steep $6,218.00. Despite the initial sticker shock, keep in mind though, that it should provide a lifetime of secure and worry-free storage for just under 10 cents per card. 

Unless you’re into the older vintage wooden boxes which aren’t very good for protection against fire or water damage, there aren’t too many modern card index filing cabinet manufacturers out there, and this may be the most solid of the group. I’ll add it shortly to the ever-growing list at The Ultimate Guide to Zettelkasten Index Card Storage.

Could one go as far as to say that the ten commandments (numbered notes) presumably etched onto stone tablets (slips) and placed into the ark of the covenant (a box) and which coherently formed the basis of knowledge and living a good life for the twelve tribes was a zettelkasten?

Why not?

Lower register (second of two) of an Illuminated manuscript page in rich colors. Two men are carrying the ark of the covenant in the center surrounded by men playing ram's horns. Above the ark is a blue circular wall representing Jericho inside of which is a jumble of buildings and heads.

On the seventh day of the siege of Jericho, the Ark of the Covenant is carried around the city, horns are blown and the walls collapse (Josh 6:20-25).
Extract from Latin Psalter from England – BSB Hss Clm 835, fol. 21r. Oxford, 1st quarter of the 13th century
Source: München, Bayerische Staatsbibliothek, CC BY-NC-SA 4.0

Chris Rock’s zettelkasten output process

In the documentary Kevin Hart & Chris Rock: Headliners Only (Netflix, 2023) while preparing for a portion of their tour, Kevin Hart admires a portion of Chris Rock’s stand up comedy method and calls it “a science”. Chris Rock writes headlines for his jokes on slips of paper and then arranges them on either tables or small bulletin boards to outline his set list for presenting jokes for his performances.

A small bulletin board with about 50 slips of colored paper pinned up on it.

Low level coffee table covered in a grid of about 40 colored slips of paper.

If there are interesting contemporaneous news items which appear, he’ll include a newspaper or other material to represent the related joke for inclusion into his set. This makes a fascinating means of outlining his material and seems to fall within the realm of my search for zettelkasten output processes. Even if Rock doesn’t use index cards to write or store his jokes like comedians in the past have, he’s using a slip-based method for outlining and arranging them as part of his output process.

Chris Rock and Kevin Hart standing up in a green room. Behind them is a small board covered with rainbow colored slips of paper.

Kevin Hart: Chris, I’m so… I’m so, uh blown away by what I’m discovering that is your process.

Chris Rock: My process.

Kevin Hart: This all your shit?

A grid of slips of colored paper with various notes written in black sharpie. Some of the headlines read: Repubs lie/Dems, Fake-Selective Outrage, Black Lives Matter, Biden, Fruit Loops, Addicted to Attention, Neighborhoods.

A grid of slips of colored paper with various notes written in black sharpie. Some of the headlines read: Shortest in Class, Daughter Supreme Court, Hillary, Cops Deliver Babies.

Chris Rock: Well, this here would be, uh, bullet points for tonight. Every card represents a joke or a reference that I choose. I don’t wanna forget. You know what I mean? Like, you can remember all your jokes, but some nights, I’m like, ‘ehhh, I’m not gonna close with this one. I’m gonna close with that one’.

Kevin Hart: You have it down to a science where you can bullet point the time.

Chris Rock: You can. And by the way, sometimes, something happens in the news.

Kevin Hart: You got jokes on the bench.

Chris Rock: I have jokes on the bench.

View of a coffee table covered with slips of paper. Next to them is a broadsheet copy of the New York Post with a big photo of Elon Musk overlaid with the headline "Musk Rat".

Kevin Hart: I’m going to tell you I’m not only impressed by that, but I’m disappointed in myself. Because, uh, whatever I got, got to to fly.