The Philosophers

The Nineteenth Century

Carl von Clausewitz (1780–1831), Prussian officer, held that war continues politics by other means: friction, two kinds of war, a purpose that limits it.

The Nineteenth Century

Auguste Comte made positivism a program for science and society, ranking the sciences and founding sociology as a study of social order.

The Nineteenth Century

Ralph Waldo Emerson left the pulpit to argue that anyone can know truth first-hand, with no church in between. His ideas, his works, his questions.

The Nineteenth Century

Ludwig Feuerbach recast religion as humanity’s projection of its own essence—and grounded philosophy in nature, feeling, and human relations.

The Nineteenth Century

Alexis de Tocqueville (1805–1859) held equality unstoppable and asked whether equal peoples stay free: tyranny of the majority, soft despotism, association.

The Nineteenth Century

John Stuart Mill held that society may coerce an adult only to prevent harm to others. His thought on liberty, happiness, logic and the equality of women.

The Nineteenth Century

Søren Kierkegaard (1813–1855) set the single individual against Hegel's system: anxiety, despair, faith as a leap, and a Christianity each must choose.

The Nineteenth Century

Henry David Thoreau built a house at Walden Pond, went to jail over a tax and held that conscience outranks the law. His ideas, his works, his questions.

The Nineteenth Century

Karl Marx traced how labor, value, and surplus value organize capitalist production in works from The Communist Manifesto to Capital.

The Nineteenth Century

Friedrich Engels linked industrial capitalism to poverty, labor exploitation, and class conflict—and helped shape Marxist social theory.

The Nineteenth Century

Herbert Spencer applied evolutionary theory to the cosmos, human society, ethics, and the scientific study of knowledge.

The Nineteenth Century

Leo Tolstoy, author of War and Peace, took Jesus's command not to resist evil literally and concluded that no Christian may serve a state built on force.

The Nineteenth Century

Henry Sidgwick, the Cambridge moralist who tested ordinary morality rule by rule and found reason itself split between duty and self-interest.

The Nineteenth Century

Charles Sanders Peirce founded pragmatism in magazine articles while measuring gravity for the Coast Survey, and left 1,650 manuscripts unpublished.

The Nineteenth Century

William James joined psychology to pragmatism, examining consciousness, belief, habit, and the practical force of experience.

The Nineteenth Century

Friedrich Nietzsche challenged inherited morality, questioned objective truth, and asked how human beings might create values of their own.

The Nineteenth Century

Francis Herbert Bradley, the Oxford idealist who argued that relations cannot be ultimately real and that reality is one experience, not a sum of parts.

The Nineteenth Century

Thérèse of Lisieux, Carmelite and Doctor of the Church, taught a little way for the weak: trust over merit, small acts of love, faith kept in darkness.