William James

Born in New York City in 1842, he came from an intellectually lively family and was the brother of novelist Henry James. After studying medicine, he turned toward psychology and philosophy, and later taught at Harvard, where he offered one of the first psychology courses in the United States.

He is best known for The Principles of Psychology, The Varieties of Religious Experience, and essays that shaped pragmatism. Across his writing, he was drawn to practical questions: how people form beliefs, how attention and habit shape experience, and how religious life can be understood without losing sight of its human depth.

Readers still return to his work because it feels both serious and personal. He could handle big ideas without sounding distant, and he wrote in a way that invites curiosity rather than demanding agreement.