Philosophy › The 19th century › Pragmatism
William James
1842–1910· Philosopher· Knowledge, logic & science
Well documentedSolid records, texts or physical evidence.
American psychologist and philosopher who popularized pragmatism: judge an idea by the difference believing it makes in experience.
See it on the Philosophy map →The idea
Idea: test ideas by their practical consequences. A Harvard professor trained in medicine, he wrote The Principles of Psychology (1890), coining 'stream of consciousness'. 'The Will to Believe' (1896) argued we may choose religious belief when evidence cannot settle the question and the stakes are real. Pragmatism (1907) called true the ideas that 'work' and spoke of an idea's 'cash value'. Main objection: Russell and others said useful is not the same as true; a comforting falsehood can work.
Why it matters
He made pragmatism America's best-known philosophy and helped found psychology as a science in the United States.
Think of it like
He asked for an idea's 'cash value': like valuing a property by what it actually yields, not by the brochure.
Legacy and sources
His books, lectures and letters survive; he set up one of the first US psychology laboratories at Harvard around 1875. His brother was the novelist Henry James.
Still debated
Whether James meant truth simply is usefulness, or only that usefulness is our test for truth, is still debated.
Connections (2)
▸William James popularized PragmatismWell documented
The connection
Peirce coined pragmatism as a method for clarifying ideas, but few read him. James gave it a public voice: a famous 1898 lecture credited Peirce and launched the word, and his bestselling Pragmatism (1907) presented truth as what works in experience. He widened it from a theory of meaning into a philosophy of life and religion.
When and how
His Berkeley lecture 'Philosophical Conceptions and Practical Results' (1898), and the Pragmatism lectures at the Lowell Institute in Boston and at Columbia, 1906–07.
How we know
The lecture and book are published, and the term's public spread is traced to them.
Debates and open questions
Peirce disliked James's looser version and renamed his own view 'pragmaticism', a word 'ugly enough to be safe from kidnappers'.
▸Charles Sanders Peirce inspired William JamesWell documented
The connection
Peirce argued that the meaning of an idea is the sum of its practical effects: calling something hard means it will not be scratched by many other substances. James, his friend since Harvard student days, built his theories of truth, religious belief and psychology on this principle, and later helped Peirce when his career collapsed.
When and how
Both belonged to the 'Metaphysical Club', an informal discussion group in Cambridge, Massachusetts, in the early 1870s; Peirce published 'How to Make Our Ideas Clear' in 1878.
How we know
James publicly credited Peirce in 1898, and decades of their letters survive.
Debates and open questions
Peirce felt James distorted his idea; scholars still debate how much James's pragmatism owes to Peirce versus James's own psychology.