Seeking the name of a science fiction novel

He had read about a young man who had been working hard for a theory. The people around him and even his family did not understand him. In the end, he finally proved the theory ~
However, because he was useless, he was not valued and eventually died of depression.
A few years later, a scientist invented a machine that could observe the past. The young man's theory was the core theory of the machine. He went back to the past and observed the young man's life once, so the story of the young man was told.
In the end, many examples were listed. Many of them were theories that everyone was familiar with. Who discovered what law, but did not know what use it had?
That's probably it. I don't know how to tell it. I hope everyone won't get dizzy from watching it.

Answer 1

The name of this science fiction novel was " The Three Bodies " trilogy. Written by Liu Cixin, it described the communication and conflict between the Earth civilization and the alien civilization. In 2015, the novel was adapted into a movie," The Three-Body Problem."