William James

William James was an American philosopher and psychologist, born in New York City on January 11, 1842, and living into an era when psychology was beginning to define itself as a modern science. He became the first educator to offer a psychology course in the United States and is often called the “father of American psychology.” In the broader intellectual life of the late 19th century, he stood among the leading American thinkers, working across philosophy, psychology, education, religion, metaphysics, epistemology, and mysticism.

James came from a wealthy and intensely intellectual family. His father, Henry James Sr., was a Swedenborgian theologian who knew many literary and intellectual figures of his day. His brother Henry became a prominent novelist, and his sister Alice became a diarist. William James received an eclectic, transatlantic education, developed fluency in German and French, and spent time in Europe repeatedly throughout his life. He first considered painting and apprenticed with William Morris Hunt in Newport, Rhode Island, before turning toward science and medicine under his father’s urging.

His path was not smooth. As a young man, James suffered from ailments of the eyes, back, stomach, and skin, was tone deaf, and experienced periods of depression that included months of suicidal thought. He studied at Harvard’s Lawrence Scientific School, then at Harvard Medical School, and in 1865 joined naturalist Louis Agassiz on an expedition up the Amazon River, though he left after eight months because of severe seasickness and mild smallpox. Illness interrupted his studies again, and he traveled to Germany in search of a cure. There, he found his deeper interests turning from medicine toward psychology and philosophy. He earned his MD in 1869 but never practiced medicine.

James spent almost all of his academic career at Harvard. He taught physiology, anatomy, psychology, and philosophy, becoming Assistant Professor of Psychology in 1876, Assistant Professor of Philosophy in 1881, full professor in 1885, Endowed Chair in Psychology in 1889, and Emeritus Professor of Philosophy in 1907. He taught his first experimental psychology course at Harvard in the 1875–1876 academic year, drawing on figures such as Hermann Helmholtz and Pierre Janet. His major books include The Principles of Psychology, Essays in Radical Empiricism, and The Varieties of Religious Experience.

With Charles Sanders Peirce, James helped establish pragmatism, and he is also cited as a founder of functional psychology. He developed radical empiricism and took part in discussions with Peirce, Oliver Wendell Holmes, and Chauncey Wright in the group known as The Metaphysical Club. He founded the American Society for Psychical Research and supported alternative approaches to healing. Later assessments ranked his reputation near the top of psychology: second in a 1991 American Psychologist survey and 14th among eminent psychologists of the 20th century in a 2002 Review of General Psychology analysis.

James’s words still feel direct because they come from a mind trained in science, tested by illness, and drawn to the practical weight of belief and action. He studied how people think, choose, doubt, heal, and live with uncertainty. That is why a line such as “Act as if what you do makes a difference. It does.” fits him so well. It carries his pragmatist sense that ideas matter most when they meet life.