In 1921, Bertrand Russell read his own obituary in Japan after a severe bout of pneumonia, and his partner Dora Black handed sarcastic flyers to journalists explaining that the dead man was unavailable for interviews. It is a fitting introduction to a figure who lived from 1872 to 1970, from the era of horse-drawn carriages to the Vietnam War. This deep dive traces how a lonely aristocratic orphan raised by his Presbyterian grandmother found emotional stability in Euclid’s geometry at age 11, applied that mathematical demand for proof to religion and discarded it, and then went to Trinity College, Cambridge, to dismantle British idealism and help found analytic philosophy.

The episode follows Russell through the grueling decade-long Principia Mathematica with Alfred North Whitehead, the 1901 semi-mystical awakening that flooded him with empathy after witnessing Whitehead’s wife in agony, his mentorship of Ludwig Wittgenstein, and his radical opposition to World War I that cost him his Trinity post, his library, and six months in Brixton Prison, where he laughed so hard at Eminent Victorians that a warden scolded him. It covers his 1920 meeting with Lenin and public rejection of Bolshevism, the experimental Beacon Hill School, the 1940 City College of New York scandal in which a judge declared him morally unfit to teach, his painful abandonment of pacifism to oppose Hitler, the 1950 Nobel Prize in Literature, the Russell-Einstein Manifesto, and his arrest at 89 for anti-nuclear civil disobedience. The through line is a man who combined uncompromising logic with profound compassion and changed his mind whenever the facts demanded it.

• How geometry became a survival mechanism for a suicidal, isolated teenager
• The rebellion against British idealism and the birth of analytic philosophy as a logical scalpel
• Why proving 1 + 1 = 2 took hundreds of pages of custom symbols
• Prison, seized books, and the friends who bought his library back at auction
• The 1930s pivot from pacifism to supporting the war against totalitarianism as the lesser of two evils