British philosopher Bertrand Russell is born in Ravenscroft, Wales. Along with A.N. Whitehead, Russell will write Principia Mathematica in 1903, an important landmark in the development of logic and the philosophy of mathematics.
Russell will also become well known for his principled stand on pacifism and his pointed critiques of religion and dogmatic beliefs generally. He will be imprisoned and fined, and he loses his teaching post at Cambridge when he condemns both sides during World War I. Bertrand Russell's critiques of religion and his advocacy of sexual freedom also cause him to lose a teaching appointment to the City College of New York.