But, luckily for us, human corruption is offset by its incompetence. Even if a corporate/group leader is a "high functioning" sociopath, his corporation is filled to the brim with people who, individually and collectively, are grossly incompetent.
Now that humans have developed nuclear weapons capable of blowing the world to smithereens, it is only a matter of time until some Larry, Moe, and Curly trip and fall on the "fire all missiles" button.
One of my views is that the aliens have in fact prevented nuclear war.
There is a lot of literature about their observation and intervention in the functioning of nuclear weapons systems.
They appear to have a “stake” in our survival as a species.
I am not “woo” about their motives—there are many possible explanations for this and many of them are quite frightening.