Bertrand Russell lived to ninety-seven and managed to be spectacularly wrong about almost as many things as he was right about — which is exactly what made him one of the twentieth century's most important thinkers. He revolutionized mathematical logic, won the Nobel Prize for Literature, was fired from multiple universities for his views on sex, and got arrested for protesting nuclear weapons in his eighties.

This episode traces Russell's extraordinary intellectual journey from the foundations of mathematics through pacifism, political activism, and serial reinvention, examining a man who treated changing his mind not as weakness but as the whole point of thinking.

• Russell and Whitehead's Principia Mathematica and the quest to ground all mathematics in logic
• His pacifism during World War I, the prison sentence, and the r ...