Alan Turning was a visionary in mathematics, cryptography, computer science, code-cracking, philosophy, and more. He set the foundations for modern computing and artificial intelligence, and helped crack the Enigma Code - saving an estimated 2 years of continuing war and up to 14 million people in the process.  He was also openly gay, which led to his arrest and chemical castration by the British authorities. It's a tragic story of a brilliant life cut too short by society's inability to view gay people as human.