First published in 1859, John Stuart Mill's On Liberty is an exhaustive exploration of social and civic liberty, its limits, and its consequences. Mill's work is a classic of political liberalism that contains a rational justification of the freedom of the individual in opposition to the claims of the state.

This book consists of two parts: the essay "The Idea of Public Reason Revisited" and "The Law of Peoples", a major reworking of a much shorter article by the same name. Taken together, they are the culmination of more than 50 years of reflection on liberalism and on some of the most pressing problems of our times.

This expanded edition of John Stuart Mill's Utilitarianism includes the text of his 1868 speech to the British House of Commons defending the use of capital punishment in cases of aggravated murder. The speech is significant both because its topic remains timely and because its arguments illustrate the applicability of the principle of utility to questions of large-scale social policy.

The Metaphysical Club was an informal group that met in Cambridge, Massachusetts, in 1872, to talk about ideas. Its members included Oliver Wendell Holmes, Jr., future associate justice of the United States Supreme Court; William James, the father of modern American psychology; and Charles Sanders Peirce, logician, scientist, and the founder of semiotics. The Club was probably in existence for about nine months. No records were kept. The one thing we know that came out of it was an idea - an idea about ideas. This book is the story of that idea.

A Treatise of Human Nature is the first work ever published by David Hume, a man who revolutionized our understanding of philosophy. Hume was an advocate of the skeptical school of philosophy and a key figure in the Scottish Enlightenment. He looks at the nature of human experience and cognition, showing that philosophy and reason can only be reflections of our nature.

In 1956, the New York Times prophesied that once global warming really kicked in, we could see parrots in the Antarctic. In 2010, when science deniers had control of the climate story, Senator James Inhofe and his family built an igloo on the Washington Mall and plunked a sign on top: AL GORE'S NEW HOME: HONK IF YOU LOVE CLIMATE CHANGE. In The Parrot and the Igloo, bestselling author David Lipsky tells the astonishing story of how we moved from one extreme (the correct one) to the other.

For much of history, societies have violently oppressed ethnic, religious, and sexual minorities. It is no surprise that many who passionately believe in social justice came to believe that members of marginalized groups need to take pride in their identity to resist injustice.

Martin Heidegger's sympathies for the conservative revolution and National Socialism have long been well known. As the rector of the University of Freiburg in the early 1930s, he worked hard to reshape the university in accordance with National Socialist policies. He also engaged in an all-out struggle to become the movement's philosophical preceptor, "to lead the leader." Yet for years, Heidegger's defenders have tried to separate his political beliefs from his philosophical doctrines

Cancel culture is a new phenomenon, and The Canceling of the American Mind is the first book to codify it and survey its effects, including hard data and research on what cancel culture is and how it works, along with hundreds of new examples showing the left and right both working to silence their enemies.

From the perspective of an unbeliever, Fear and Trembling explores the paradox of faith, the nature of Christianity, and the complexity of human emotion. Kierkegaard examines the biblical story of Abraham, who was instructed to sacrifice his son Isaac, and forces us to consider Abraham's state of mind. What drove Abraham, and what made him carry out such an absurd and extreme request from God? Kierkegaard argues that Abraham's agreement to sacrifice Isaac, and his suspension of reason, elevated him to the highest level of faith.

Immanuel Kant’s Critique of Pure Reason can lay claim to being the most important single work of modern philosophy, a work whose methodology, if not necessarily always its conclusions, has had a profound influence on almost all subsequent philosophical discourse. In this work Kant addresses, in a groundbreaking elucidation of the nature of reason, the age-old question of philosophy: “How do we know what we know?” and the limits of what it is that we can know with certainty.

First published in response to John Rawls' A Theory of Justice, Robert Nozick's Anarchy, State, and Utopia has since become one of the defining texts in classic libertarian thought. Challenging and ultimately rejecting liberal, socialist, and conservative agendas, Nozick boldly asserts that the rights of individuals are violated as a state's responsibilities increase—and the only way to avoid these violations rests in the creation of a minimalist state limited to protection against force, fraud, theft, and the enforcement of contracts.

The leviathan is the vast unity of the State. But how are unity, peace, and security to be attained? Hobbes’ answer is sovereignty, but the resurgence of interest today in Leviathan is due less to its answers than its methods: Hobbes sees politics as a science capable of the same axiomatic approach as geometry.

The Tractatus Logico-Philosophicus (Logical Philosophical Treatise or Treatise on Logic and Philosophy) is the only full-length philosophical book by the Austrian philosopher Ludwig Wittgenstein that was published during his lifetime. The goal of the work is to identify the relationship between language and reality and to define the limits of science. He famously summarized the book in the following way: "What can be said at all can be said clearly; and what we cannot talk about we must pass over in silence."

The Theory of Moral Sentiments (1759) was the first major text by Adam Smith who, seven years later, was to publish what was to become one of the major economic classics, The Wealth of Nations (1776). However, Smith regarded The Theory of Moral Sentiments as his most important work because in it he identified the profound human instinct to act not necessarily in self-interest but through, as he phrased it, a ‘mutual sympathy of sentiments’.