Søren Kierkegaard

Born in Copenhagen on May 5, 1813, he became one of Denmark's most original thinkers: a philosopher, theologian, and sharp social critic. Reference works including Britannica and the Stanford Encyclopedia of Philosophy describe him as a major influence on existentialism, while noting how widely his writing ranges across philosophy, religion, psychology, literary criticism, and fiction.

Much of his writing pushed back against large, impersonal systems of thought and insisted that truth matters most as something lived by an individual person. He is especially remembered for exploring anxiety, despair, faith, and ethical choice, often through indirect styles and pseudonymous works that invite readers to wrestle with ideas for themselves.

His life was relatively short—he died in Copenhagen on November 11, 1855—but his influence has lasted far beyond his century. Thinkers in theology, philosophy, literature, and psychology continued to return to his work because it asks intimate questions about how a person should live, believe, and become themselves.