In my view one of the most glaring indictments of the way philosophy and other humanities are taught and practiced is the senseless insistence on reading original works by the great masters. This is most apparent in the continued consumption of Plato, Hobbes, Aristotle and the like in philosophy but can be equally well be seen in the reverance for Chaucer, Shakespeare or other literary classics. To my horror this reverence for the original works is even being promoted in economics. So even though I gave a short reply in the comments at overcoming bias when this issue came up I’ve been meaning to discuss the question in more detail.

For the moment I’d like to set aside the issue of literature for another post and focus on subjects like philosophy and economics where (at least in theory) the aim is to genuinely progress towards a (more) accurate/useful understanding. Since I find it genuienly perplexing why one would ever feel the need to read the originals rather than the digested and improved material found in modern expositions as one does in math of physics I’ll quote Tyler Cowen’s justifications for returning to the original thinkers. Obviously these don’t represent every possible justification but they are the best justifications I’ve ever heard.

First though I’d like to be perfectly clear that the issue under consideration is whether there is some pedagogical benefit to reading original thinkers as opposed to modern summaries (of either the original thinker or simply the current state of the discipline). There is no accounting for taste so if you simply have some Plato fetish or like the way reading Plato makes you feel sophisticated you might find it more enjoyable to read Plato rather than more modern work just as someone else might prefer to have their philosophical arguments interspersed in Harry Potter slash. Also if your interest is in original historical research then influential works are a reasonable thing to read¹ but again the question at hand is the benefit of reading original works by great thinkers to the advancement of the discipline itself not it’s history or the practitioners feelings of sophistication. With this point clear let’s examine what Tyler Cowen has to say point by point.

1. Secondary sources are unreliable and they do not capture or understand many of the original insights. To remove it from the distant past, what I get from John Rawls or Robert Nozick is quite distinct from what I get from their distillers.

So what? The standard isn’t whether a latter distillation captures the exact content but whether it’s a more effective way to gain understanding. Reading a modern calculus book is extremely different from reading the original Newton. Newton’s notions of infinitesimals and fluxions have been excisced wholesale and replaced with the modern notions of limits and epsilon-delta proofs and that’s a huge improvement in the ability of calculus books to convey understanding.

2. Truly great thinkers require numerous distillers. Can you read just one book on Keynes? No. So you have to read a few. Shouldn’t one of these then be Keynes himself? Yes.

This presupposes the goal is to understand what Keynes thought. Keynes was a brilliant economist but he was just as human as the rest of us and some of his ideas were simply confused or poorly thought out. The benefit of later distillers is to transmit the insights while avoiding the confusions, so no, one of these shouldn’t be Keynes himself.

I mean imagine Keynes was really a highlander and was still alive and at the height of his intellectual powers. Who would it be more beneficial to read the 1936 Keynes or the 2010 Keynes who has used the intervening years to excise the confused parts of The General Theory and find more lucid explanations of the key insights? Surely it’s the 2010 Keynes who would (likely) provide the better explanation (if you disagree would you go back to his half-assembled notes? Further?). Yet surely if Keynes could improve on his own work than (as the goal is to convey economic ideas not Keynes personal beliefs) surely others could as well, especially when the benefit from the collaboration and exchange of ideas provided the academic discipline.

3. The errors of top thinkers are often more interesting and instructive than their successes. Distillers have a hard time capturing these errors and their fruitfulness.

But that’s the wrong comparison. The right comparison is whether it’s more useful to build upon the work of past greats and digest this new material including the mistakes made by those who have built upon the great thinkers of the past than to spend time digesting the errors of the past. Obviously if it was costless one would read every book on the subject but the key question question is would the time spent exploring the errors made by Keynes be better spent exploring later work that builds upon his insights.. The reason it’s so tempting to advocate reading originals is that we don’t properly take into account the opportunity costs incurred reading those originals.

Moreover, given that there is only so much time for students (or professors) to devote to learning a subject either one must give up totally on the idea of making progress or admit that it’s sometimes more effective to substitute modern materials for some works of great thinkers. Hence this argument either proves too much (progress is impossible because it’s always better to learn from the mistakes of past great thinkers) or proves nothing at all since we continuously make beneficial trade offs of replacing originals with more modern works.

4. We often read great thinkers not to learn what they understood but also to set our minds racing and to find interesting new questions. Great thinkers are usually better at supplying this service than are their distillers.

Again this assumes that the job of the distiller is to summarize the original author. A good analysis book doesn’t summarize Newton it digests his insights and presents them as part of a grander theory. Reading a modern analysis book does a much better job a posing interesting new questions than does reading Newton.[^empirial]

Moreover, I suggest this is largely a placebo effect. One is told that the reading great thinkers in the original is particularly inspiring so we search for questions to inspire us. We would probably do equally well if told that Joyce’s Ulysses conveyed deep economic questions. If you doubt this consider the stunningly large number of people who, despite not being religious, claim to derive deep moral messages and insights from the bible despite it’s blatant encouragement of genocide, rape, and every other kind of brutality imaginable.

5. Sometimes the value is in having read common sources and benefiting from the commonality per se. Great thinkers are usually more focal than any of their distillers and thus reading them is a good input for discussions with others.

OFten this is simply false as influential textbooks and articles are often just as widely read. More importantly by virtue of the novelty of their ideas original thinkers are usually lacking in clarity meaning the same work is usually interpreted in a host of different ways.. However, even if true this argues for more canonical books. In mathematics this issue is solved by the publication of various yellow books that provide a common base for everyone to use as a reference and there is no reason not to do the same for other subjects.

6. Original sources often help you challenge or reexamine your world view or intellectual ethos. Distillers very often pander to that world view, while pretending to challenge you.

Given their status as influential originals the content in these works has largely been either incorporated into your modern world view or people have developed standard objections. I know my world view (or even philosophical position) has never been threatened by the original work of an past great thinker but often it’s been shaken by a new argument or idea from a modern source.

7. Consider a simple comparison. You can read either Adam Smith’s two major books or any ten or even twenty books on him, toss in articles if you wish. It’s a no-brainer which you should choose.

Right, neither. Who the hell cares what some dude named Adam Smith thought. Given the choice between reading a modern economic textbook and any of Adam Smith’s books I know which one I would choose and it’s the same thing we always choose for undergraduates.

8. The best distillers often are original sources in their own right (and in part unreliable expositors), such as in Charles Taylor’s excellent book on Hegel.

Again the false dichotomy. Instead of trying to find out what Hegel said we should be finding out what is true (which in the case of Hegel will involve simply ignoring him).

9. Distillation works best in very exact sciences, such as physics and mathematics. If you rely on distillation for an inexact science, you will do best at capturing its exact parts. You will be left with a systematic bias, and knowledge gap, regarding its inexact parts.

So it’s only when you can’t actually go out and check whether going back to read the original works by great thinkers that it’s beneficial? That’s awful suspicious

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Stepping back for a moment I would point out the fact that there are many different mutually contradictory disciplines of theology (every major world religion has one). Thus regardless of your religious views (and especially if you are an atheist) you must admit that there are academic disciplines which are totally bullshit. Now I would point out that in virtually all instances of theological study the original work of prior influential (but not prophets or otherwise supernaturally gifted) theologians is regarded as similarly important to read in the original.

Hence, we must all admit there are situations where academic disciplines are convinced of the important of reading influential past thinkers in the original despite even though it provides no actual benefit. Conversely in all those disciplines where we have reliable quantatative measurements of progress (with the obvious exception of history) returning to the original works of past great thinkers is decidedly unhelpful. Therefore at the very least anyone who wishes to claim that reading past great thinkers in the original (be it Plato, Keynes, Aristotle or whomever) has a substantial argumentative burden to meet and until they do the assumption should be against spending time doing so.