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SoBrief
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The Philosophy of the Enlightenment
by Ernst Cassirer • 1932
The Enlightenment remade reason: not a storehouse of truths, but a way of discovering them.
4.11
258
The Philosophy of the Enlightenment Summary
The Philosophy of the Enlightenment 91%
The Enlightenment remade reason: not a storehouse of truths, but a way of discovering them.
by Ernst Cassirer 1932
4.11
258 ratings
The Age of Reason
by Thomas Paine • 1794
God's word is the universe, not a book. Everything else is hearsay passed off as revelation.
4.12
9k+
The Age of Reason Summary
The Age of Reason 91%
God's word is the universe, not a book. Everything else is hearsay passed off as revelation.
by Thomas Paine 1794
4.12
9k+ ratings
Soul Machine
by George Makari • 2015
Science couldn't find the soul. So early modern Europe invented the mind to take its place.
3.82
157
Soul Machine Summary
Soul Machine 90%
Science couldn't find the soul. So early modern Europe invented the mind to take its place.
by George Makari 2015
3.82
157 ratings
The Enlightenment
by John Robertson • 2015
It was never a single creed. The Enlightenment was three generations arguing how humans should live.
3.56
302
The Enlightenment Summary
The Enlightenment 90%
It was never a single creed. The Enlightenment was three generations arguing how humans should live.
by John Robertson 2015
3.56
302 ratings
A Book Forged in Hell
by Steven Nadler • 2011
Spinoza's 1670 treatise denied miracles, called the Bible man-made, and made free thought sacred.
3.99
1k+
A Book Forged in Hell Summary
A Book Forged in Hell 90%
Spinoza's 1670 treatise denied miracles, called the Bible man-made, and made free thought sacred.
by Steven Nadler 2011
3.99
1k+ ratings
The Great Agnostic
by Susan Jacoby • 2013
The man who drew thousands to hear him speak: why America forgot Robert Ingersoll.
4.04
720
The Great Agnostic Summary
The Great Agnostic 90%
The man who drew thousands to hear him speak: why America forgot Robert Ingersoll.
by Susan Jacoby 2013
4.04
720 ratings
Why I Am Not a Christian and Other Essays on Religion and Related Subjects
by Bertrand Russell • 1957
Religion begins in fear, not truth. A philosopher's case against the foundations of belief.
4.00
23k+
Why I Am Not a Christian and Other Essays on Religion and Related Subjects Summary
Why I Am Not a Christian and Other Essays on Religion and Related Subjects 90%
Religion begins in fear, not truth. A philosopher's case against the foundations of belief.
by Bertrand Russell 1957
4.00
23k+ ratings
Fearless
by Max Lucado • 2009
Ten philosophers, ten arguments that still govern how we think about truth, justice, and ourselves.
4.16
13k+
Fearless Summary
Fearless 89%
Ten philosophers, ten arguments that still govern how we think about truth, justice, and ourselves.
by Max Lucado 2009
4.16
13k+ ratings
Lectures of Col. Robert Green Ingersoll
by Robert G. Ingersoll • 1942
Bible's God commands atrocities; its devil shows more mercy. Ingersoll's case for reason over faith.
4.60
119
Lectures of Col. Robert Green Ingersoll Summary
Lectures of Col. Robert Green Ingersoll 89%
Bible's God commands atrocities; its devil shows more mercy. Ingersoll's case for reason over faith.
by Robert G. Ingersoll 1942
4.60
119 ratings
Principles of Human Knowledge / Three Dialogues Between Hylas and Philonous
by George Berkeley • 1988
Tables vanish when you look away, but God keeps watching. A bishop's case against matter.
3.83
1k+
Principles of Human Knowledge / Three Dialogues Between Hylas and Philonous Summary
Principles of Human Knowledge / Three Dialogues Between Hylas and Philonous 89%
Tables vanish when you look away, but God keeps watching. A bishop's case against matter.
by George Berkeley 1988
3.83
1k+ ratings
The Edge of Reason
by Julian Baggini • 2016
Reason is not sterile logic. It depends on judgment, emotion, and the temperament we bring.
3.97
141
The Edge of Reason Summary
The Edge of Reason 89%
Reason is not sterile logic. It depends on judgment, emotion, and the temperament we bring.
by Julian Baggini 2016
3.97
141 ratings
Humanly Possible
by Sarah Bakewell • 2023
Humanism's 700-year bet: that reason and kindness, not gods or ideologies, will save us.
4.01
2k+
Humanly Possible Summary
Humanly Possible 89%
Humanism's 700-year bet: that reason and kindness, not gods or ideologies, will save us.
by Sarah Bakewell 2023
4.01
2k+ ratings
The Myth of the State
by Ernst Cassirer • 1946
The Greeks fought myth with reason. The modern state perfected it as a weapon.
3.90
209
The Myth of the State Summary
The Myth of the State 89%
The Greeks fought myth with reason. The modern state perfected it as a weapon.
by Ernst Cassirer 1946
3.90
209 ratings
Think!
by Michael R. LeGault • 2006
Gut feelings are not wisdom. A defense of slow reason in a culture that worships intuition.
3.1
519
Think! Summary
Think! 89%
Gut feelings are not wisdom. A defense of slow reason in a culture that worships intuition.
by Michael R. LeGault 2006
3.1
519 ratings
Objectivism
by Leonard Peikoff • 1991
Reality comes first, reason is mandatory, and your life is the moral standard. The complete chain.
3.77
5k+
Objectivism Summary
Objectivism 89%
Reality comes first, reason is mandatory, and your life is the moral standard. The complete chain.
by Leonard Peikoff 1991
3.77
5k+ ratings
Rights of Man, Common Sense and Other Political Writings
by Thomas Paine • 1776
Rights aren't gifts from kings. Government works for you, and when it fails, you replace it.
4.02
521
Rights of Man, Common Sense and Other Political Writings Summary
Rights of Man, Common Sense and Other Political Writings 89%
Rights aren't gifts from kings. Government works for you, and when it fails, you replace it.
by Thomas Paine 1776
4.02
521 ratings
The Abolition of Man
by C.S. Lewis • 1943
The final product of denying objective value is not freedom but a humanity ruled by impulse.
4.12
42k+
The Abolition of Man Summary
The Abolition of Man 89%
The final product of denying objective value is not freedom but a humanity ruled by impulse.
by C.S. Lewis 1943
4.12
42k+ ratings
Ethics
by Baruch Spinoza • 1677
God and nature are one; free will, an illusion. Freedom is grasping the causes that move you.
4.10
22k+
Ethics Summary
Ethics 89%
God and nature are one; free will, an illusion. Freedom is grasping the causes that move you.
by Baruch Spinoza 1677
4.10
22k+ ratings
Common Sense, The Rights of Man and Other Essential Writings
by Thomas Paine • 1776
Government is a necessary evil, rights belong to people not rulers, and monarchy is a fraud.
4.14
16k+
Common Sense, The Rights of Man and Other Essential Writings Summary
Common Sense, The Rights of Man and Other Essential Writings 89%
Government is a necessary evil, rights belong to people not rulers, and monarchy is a fraud.
by Thomas Paine 1776
4.14
16k+ ratings
Meditations on First Philosophy
by René Descartes • 1641
An all-powerful deceiver could control every thought you have. Every thought, except one.
3.73
30k+
Meditations on First Philosophy Summary
Meditations on First Philosophy 89%
An all-powerful deceiver could control every thought you have. Every thought, except one.
by René Descartes 1641
3.73
30k+ ratings
Pocket Guide to Objectivism
by David Kelley • 2018
Happiness as the moral aim, reason as the only path: the pocket guide to Objectivism.
4.22
46
Pocket Guide to Objectivism Summary
Pocket Guide to Objectivism 89%
Happiness as the moral aim, reason as the only path: the pocket guide to Objectivism.
by David Kelley 2018
4.22
46 ratings
Plato and a Platypus Walk Into a Bar
by Thomas Cathcart • 2007
Jokes and philosophy work the same way: both ambush your assumptions. Here's how.
3.76
18k+
Plato and a Platypus Walk Into a Bar Summary
Plato and a Platypus Walk Into a Bar 89%
Jokes and philosophy work the same way: both ambush your assumptions. Here's how.
by Thomas Cathcart 2007
3.76
18k+ ratings
Explaining Postmodernism
by Stephen R.C. Hicks • 2004
When socialism failed, the academic Left didn't abandon the project. It abandoned truth instead.
3.88
2k+
Explaining Postmodernism Summary
Explaining Postmodernism 89%
When socialism failed, the academic Left didn't abandon the project. It abandoned truth instead.
by Stephen R.C. Hicks 2004
3.88
2k+ ratings
Meditations on First Philosophy, with Selections from the Objections and Replies
by René Descartes • 1641
By the fire, he resolves to doubt everything, only to find a thought immune to doubt.
3.73
3k+
Meditations on First Philosophy, with Selections from the Objections and Replies Summary
Meditations on First Philosophy, with Selections from the Objections and Replies 89%
By the fire, he resolves to doubt everything, only to find a thought immune to doubt.
by René Descartes 1641
3.73
3k+ ratings
The Rise of Modern Philosophy
by Anthony Kenny • 2006
How consciousness replaced the soul, systems replaced commentary, and philosophy became modern.
3.84
274
The Rise of Modern Philosophy Summary
The Rise of Modern Philosophy 89%
How consciousness replaced the soul, systems replaced commentary, and philosophy became modern.
by Anthony Kenny 2006
3.84
274 ratings
The End of Faith
by Sam Harris • 2004
Religious moderates make faith immune to criticism, and extremists exploit that immunity.
3.89
44k+
The End of Faith Summary
The End of Faith 89%
Religious moderates make faith immune to criticism, and extremists exploit that immunity.
by Sam Harris 2004
3.89
44k+ ratings
Hume
by Alfred Jules Ayer • 1980
Hume's demolition: what we can know without a self, a cause, or a moral law.
3.14
375
Hume Summary
Hume 89%
Hume's demolition: what we can know without a self, a cause, or a moral law.
by Alfred Jules Ayer 1980
3.14
375 ratings
The Quotable Hitchens from Alcohol to Zionism
by Christopher Hitchens • 2011
Faith corrodes, speech must be absolute, and some wars are just: Hitchens at his most unsparing.
4.11
1k+
The Quotable Hitchens from Alcohol to Zionism Summary
The Quotable Hitchens from Alcohol to Zionism 89%
Faith corrodes, speech must be absolute, and some wars are just: Hitchens at his most unsparing.
by Christopher Hitchens 2011
4.11
1k+ ratings
Whose Justice? Which Rationality?
by Alasdair MacIntyre • 1988
Neutral reason is a myth. Every standard of justice carries the history of a specific tradition.
4.24
409
Whose Justice? Which Rationality? Summary
Whose Justice? Which Rationality? 89%
Neutral reason is a myth. Every standard of justice carries the history of a specific tradition.
by Alasdair MacIntyre 1988
4.24
409 ratings
After Utopia
by Judith N. Shklar • 1970
When political faith collapsed, every tradition fell into its own fatalism. Theory never recovered.
4.15
40
After Utopia Summary
After Utopia 89%
When political faith collapsed, every tradition fell into its own fatalism. Theory never recovered.
by Judith N. Shklar 1970
4.15
40 ratings
God Is Not Great
by Christopher Hitchens • 2007
The case against God: holy books authored by humans, moral codes that fail their own standards.
3.96
113k+
God Is Not Great Summary
God Is Not Great 88%
The case against God: holy books authored by humans, moral codes that fail their own standards.
by Christopher Hitchens 2007
3.96
113k+ ratings
Letters to a Young Contrarian
by Christopher Hitchens • 2001
Thinking for yourself will cost you friends and comfort. This is why you do it anyway.
4.13
13k+
Letters to a Young Contrarian Summary
Letters to a Young Contrarian 88%
Thinking for yourself will cost you friends and comfort. This is why you do it anyway.
by Christopher Hitchens 2001
4.13
13k+ ratings
Arguably
by Christopher Hitchens • 2011
Tyranny, religion, empire, sentimentality: what remains after clarity and history have their say.
4.20
10k+
Arguably Summary
Arguably 88%
Tyranny, religion, empire, sentimentality: what remains after clarity and history have their say.
by Christopher Hitchens 2011
4.20
10k+ ratings
There Are Two Errors in the the Title of This Book
by Robert M. Martin • 1992
Logic, morality, identity: each cracks under a well-chosen paradox. This book chooses well.
4.01
247
There Are Two Errors in the the Title of This Book Summary
There Are Two Errors in the the Title of This Book 88%
Logic, morality, identity: each cracks under a well-chosen paradox. This book chooses well.
by Robert M. Martin 1992
4.01
247 ratings
A Vindication of the Rights of Women
by Mary Wollstonecraft • 1792
Women aren't born inferior; they're trained to be. The 1792 argument that invented modern feminism.
3.92
27k+
A Vindication of the Rights of Women Summary
A Vindication of the Rights of Women 88%
Women aren't born inferior; they're trained to be. The 1792 argument that invented modern feminism.
by Mary Wollstonecraft 1792
3.92
27k+ ratings
Fallen Leaves
by Will Durant • 2014
At life's end, a historian sets down what he knows about desire, war, art, and God.
3.92
1k+
Fallen Leaves Summary
Fallen Leaves 88%
At life's end, a historian sets down what he knows about desire, war, art, and God.
by Will Durant 2014
3.92
1k+ ratings
An Essay Concerning Human Understanding
by John Locke • 1690
Words name ideas, not things. Philosophy's longest arguments begin with confusing the two.
3.86
17k+
An Essay Concerning Human Understanding Summary
An Essay Concerning Human Understanding 88%
Words name ideas, not things. Philosophy's longest arguments begin with confusing the two.
by John Locke 1690
3.86
17k+ ratings
Expected Returns
by Antti Ilmanen • 2011
The Illuminati's real secret: a curriculum to perfect humans until governments became unnecessary.
4.37
383
Expected Returns Summary
Expected Returns 88%
The Illuminati's real secret: a curriculum to perfect humans until governments became unnecessary.
by Antti Ilmanen 2011
4.37
383 ratings
Per la pace perpetua
by Immanuel Kant • 1795
A Dutch inn sign with a cemetery: Kant's starting point for a plan to end war.
3.59
3k+
Per la pace perpetua Summary
Per la pace perpetua 88%
A Dutch inn sign with a cemetery: Kant's starting point for a plan to end war.
by Immanuel Kant 1795
3.59
3k+ ratings
Critique of Practical Reason
by Immanuel Kant • 1788
Morality comes from reason alone, not feelings or consequences; through it we discover our freedom.
3.94
12k+
Critique of Practical Reason Summary
Critique of Practical Reason 88%
Morality comes from reason alone, not feelings or consequences; through it we discover our freedom.
by Immanuel Kant 1788
3.94
12k+ ratings
Rationality
by Eliezer Yudkowsky • 2015
Human reason is buggy code. Here is the patch from cognitive science and AI.
4.32
2k+
Rationality Summary
Rationality 88%
Human reason is buggy code. Here is the patch from cognitive science and AI.
by Eliezer Yudkowsky 2015
4.32
2k+ ratings
The Stillborn God
by Mark Lilla • 2007
Politics broke from God only recently, and Weimar nearly put them back together.
3.60
289
The Stillborn God Summary
The Stillborn God 88%
Politics broke from God only recently, and Weimar nearly put them back together.
by Mark Lilla 2007
3.60
289 ratings
Critique of Pure Reason
by Immanuel Kant • 1781
The mind's hidden architecture makes experience possible and certain questions unanswerable.
3.96
43k+
Critique of Pure Reason Summary
Critique of Pure Reason 88%
The mind's hidden architecture makes experience possible and certain questions unanswerable.
by Immanuel Kant 1781
3.96
43k+ ratings
The Rise and Fall of Rational Control
by Harvey Claflin Mansfield • 2026
Reason promised to liberate us. It delivered a chain of necessity we forged ourselves.
4.10
29
The Rise and Fall of Rational Control Summary
The Rise and Fall of Rational Control 88%
Reason promised to liberate us. It delivered a chain of necessity we forged ourselves.
by Harvey Claflin Mansfield 2026
4.10
29 ratings
An Enquiry Concerning Human Understanding
by David Hume • 1748
If a book contains neither math nor experiment, it is worthless. A philosopher explains why.
3.94
23k+
An Enquiry Concerning Human Understanding Summary
An Enquiry Concerning Human Understanding 88%
If a book contains neither math nor experiment, it is worthless. A philosopher explains why.
by David Hume 1748
3.94
23k+ ratings
Dialectic of Enlightenment
by Max Horkheimer • 1947
The drive to free humanity through reason ends in mass conformity and a new mythology.
4.11
8k+
Dialectic of Enlightenment Summary
Dialectic of Enlightenment 88%
The drive to free humanity through reason ends in mass conformity and a new mythology.
by Max Horkheimer 1947
4.11
8k+ ratings
A History of Western Philosophy
by Bertrand Russell • 1945
A history of philosophy that reads not like a textbook but like a three-thousand-year argument.
4.13
42k+
A History of Western Philosophy Summary
A History of Western Philosophy 88%
A history of philosophy that reads not like a textbook but like a three-thousand-year argument.
by Bertrand Russell 1945
4.13
42k+ ratings
The Theological Origins of Modernity
by Michael Allen Gillespie • 2008
The modern world is a theological argument that left the church and took over everything.
4.23
270
The Theological Origins of Modernity Summary
The Theological Origins of Modernity 88%
The modern world is a theological argument that left the church and took over everything.
by Michael Allen Gillespie 2008
4.23
270 ratings
The Great Debate
by Yuval Levin • 2013
Burke and Paine split over human nature and justice. Their argument became right and left.
3.87
1k+
The Great Debate Summary
The Great Debate 88%
Burke and Paine split over human nature and justice. Their argument became right and left.
by Yuval Levin 2013
3.87
1k+ ratings
The Problems of Philosophy
by Bertrand Russell • 1912
Your senses are private. Matter is an inference. Timeless universals hold the rest.
3.90
19k+
The Problems of Philosophy Summary
The Problems of Philosophy 88%
Your senses are private. Matter is an inference. Timeless universals hold the rest.
by Bertrand Russell 1912
3.90
19k+ ratings
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