There are some philosophers who exist to uphold the status quo, and others who exist to upset it — Marx, of course, belongs to the second lot. For my part, I should reject both those as not being the true business of a philosopher, and I should say the business of a philosopher is not to change the world but to understand it, which is the exact opposite to what Marx said.

Bertrand Russell (1872–1970) English mathematician and philosopher

Interview by Woodrow Wyatt, BBC TV (1959)

Collected in Bertrand Russell's BBC Interviews (1959) [UK] and Bertrand Russell Speaks His Mind (1960) [US]. Reprinted (abridged) in The Humanist (1982-11/12), and in Russell Society News, #37 (1983-02).