r/philosophy · 2021
Most-mentioned books in r/philosophy during 2021
This page ranks books by exact tracked mentions in r/philosophy within the published source unit for 2021. Counts come from the reconciled subreddit-by-month matrix; a source unit may be a bounded sample.
#1 Meditations
Marcus Aurelius
The Roman emperor's private notebook — written to himself in Greek, never meant to be published — became the Stoic canon's most-cited text 1,800 years later.
#2 The Myth of Sisyphus
Albert Camus
A 1942 essay that opens with the question of whether life is worth living and ends by insisting Sisyphus is happy.
#3 Thus Spoke Zarathustra
Friedrich Nietzsche
Nietzsche's prophet descends a mountain with three ideas — the Ubermensch, eternal recurrence, the death of God — and r/askphilosophy explains why to read something else first.
#4 Beyond Good and Evil
Friedrich Nietzsche
Nietzsche dismantles the moral framework Western civilization built on, then refuses to tell you what to replace it with.
#5 Critique of Pure Reason
Immanuel Kant
Kant's 1781 attempt to settle the limits of human knowledge — the book that split philosophy in two and still hasn't been fully digested.
#6 Tractatus Logico-Philosophicus
Ludwig Wittgenstein
Wittgenstein built a numbered ladder from logical atomism to the inexpressible, then said the ladder had to be discarded once you climbed it.
#7 Nicomachean Ethics
Aristotle
Aristotle's 2,400-year-old argument that living well depends on virtue, leisure, and the company you keep — still the canonical text for the field.
#8 The Republic
Plato
A 2,400-year-old Athenian asks why anyone would choose justice over injustice, then spends 400 pages building a city to answer the question.
#9 Being and Time
Martin Heidegger
Heidegger's argument that human existence only gets its meaning from death — 162 Reddit mentions, mostly from people explaining why it's so hard to read.
#10 Letters from a Stoic
Seneca
Seneca writes 124 letters to a friend about grief, fear, and wasted time — and 163 Reddit mentions later, r/Stoicism still treats them as the first thing to read.
#11 On the Genealogy of Morals
Friedrich Nietzsche
Nietzsche traces where 'good' and 'evil' come from — and argues the answer involves priests, resentment, and a deliberate inversion of aristocratic values.
#12 Phaedo
Plato
Socrates spends his final hours arguing that the soul survives death — and inviting his friends to find the holes in his logic.
#13 Sophie's World
Jostein Gaarder
A teenage girl in Norway starts receiving anonymous philosophy lessons by mail and slowly realizes she might be a character in someone else's story.
#14 A History of Western Philosophy
Bertrand Russell
Bertrand Russell recaps 2,500 years of philosophy from ancient Greece to logical positivism, with opinions — many of them wrong, all of them readable.
#15 A Theory of Justice
John Rawls
The 1971 book that reset political philosophy by asking what principles rational people would choose if they didn't know where they'd land in society.
#16 Apology
Plato
A philosopher on trial chooses death over silence, defending a life of relentless questioning before the jury that will kill him.
#17 Ego Is the Enemy
Ryan Holiday
Ryan Holiday's case for subordinating ego to craft draws 41 Reddit mentions, most from r/Stoicism, where the book is treated as a gateway to the primary sources.
#18 Fear and Trembling
Søren Kierkegaard
Kierkegaard uses Abraham's knife at Isaac's throat to ask whether any act of faith can be explained to the person standing next to you.
#19 Groundwork of the Metaphysics of Morals
Immanuel Kant
Kant's 1785 argument that morality comes from reason alone — the Categorical Imperative in its original 90-page form, before the Critiques complicate everything.
#20 How to Be a Stoic
Massimo Pigliucci
A philosopher uses Epictetus as a conversation partner to translate Stoic practice into a secular, atheism-compatible framework for daily life.
#21 On Liberty
John Stuart Mill
Mill's 1859 case for why society has no right to silence you — even when you're wrong — distilled to 130 pages that r/askphilosophy assigns before almost anything else.
#22 On the Shortness of Life
Seneca
Seneca wrote this letter to a friend who kept saying he'd live properly once he had more time — and explained why that day never comes.
#23 The Obstacle Is the Way
Ryan Holiday
Ryan Holiday repackages Marcus Aurelius for the self-help aisle, and r/Stoicism's 140 mentions say it mostly works as an on-ramp.