Nothing is sacred. Sex, morality, politics, society - all are fair game for Bertrand Russell's acerbic wit and keen eye. With What I Believe first published in 1925, Russell took on organized religion. Along with Why I Am Not a Christian, this essay must rank as the most articulate example of Russell's famed atheism. It is also one of the most notorious. Used as evidence in a 1940 court case in which Russell was declared unfit to teach college-level philosophy, What I Believe was to become one of his most defining works. The ideas contained within were and are controversial, contentious and - to the religious - downright blasphemous. More than three-quarters of a century after it was written, the arguments within this essay continue to challenge one's faith and assumptions. A remarkable work, it remains the best concise introduction to Russell's thought.

Bertrand Russell (1872-1970). The leading British philosopher of the twentieth century, who made major contributions in the areas of logic and epistemology. Politically active and habitually outspoken, his ethical principles twice led to imprisonment.