Alan Turing was a pioneering British computer scientist and mathematician, known for breaking the Nazi Enigma code during WWII and laying the foundation for modern computer science and artificial intelligence through his concept of the Turing machine. Despite his immense contributions, Turing faced personal hardships, including persecution for his homosexuality, and he tragically died by cyanide poisoning in 1954. His legacy has since been honored through a royal pardon, representation on currency, and the ACM Turing Award, highlighting the importance of acknowledging diversity and perseverance in society.