His own explanation was that the means he used to discover these secrets were quite disgraceful.
"All my experiments violated your human ethics and morals, even to the point of being extremely evil. Although I have uncovered many secrets about the soul and found significant uses for them, I cannot share them with you," he said.
The current policy of the Great Alliance is to forgive the past mistakes of the evil gods of the Nine Heavens pantheon, but to judge their present transgressions according to current laws.
The key figures in the judicial system are the former evil gods and their minions, so there are certainly many instances of injustice at work, but society is quickly developing, and the situation is rapidly improving. If we endure the next few years, all things will become much easier.
The population of the lower races is so numerous that, in this era, they are the main body of society, determining the direction of its development.