Turing was the greatest scientist and computer researcher of the last century. He has been called the father of computing by later generations, so Turing's contributions were mainly focused on the field of computing, but he changed the course of human civilisation twice in his life, and in two completely different fields and with completely different approaches. The first time, he creatively proposed the famous Turing machine model(Fortnow, 2012), a theory that was very advanced and bold at the time, and laid a solid foundation for the later logical work of modern computers. The second time, during the war, Turing had assisted the military in disarming the famous German cryptographic system. Turing's glory years coincided with the years of war in Europe, when the European countries were in chaos and the lower and middle classes were suffering, and all were baptized by the war. Turing broke the codes for the Allies and helped them win World War II, which won peace for the world, saved millions of human beings and brought sunshine to the people, and also made a great contribution to ending the war. Some historians have initially asserted that Turing, on his own, brought the Second World War to an end at least two years earlier and that he saved at least ten thousand lives!
Turing's contributions go far beyond what has been described above, and a few hundred words are not enough to summarise the life of this legendary genius. As the world's famous father of artificial intelligence, Turing brought about a huge change in the way modern people live and think, and it can be said that without Turing, the world of computer research would have been set back at least 30 years.
However, it must be mentioned that he had to fight his way through the path of science, but ultimately lost out to a demon that was both good and evil - human morality. In those days, homosexuality was a dirty, ugly, socially deviant existence. They were hated and banished, and their freedom was closed off. All this made it impossible for Turing to survive spiritually and ultimately led to his death in the face of public opinion. If I were to sum up this great man in one sentence, I would say: Turing saved millions of human beings, he was born in the right time, but in the wrong era.
Turing, S. 2012 Alan M. Turing : Centenary Edition. Cambridge: Cambridge University Press.