The Revolution also unleashed powerful political, social, and economic forces that would transform the post-Revolution politics and society, including increased participation in politics and governance, the legal institutionalization of religious toleration, and the growth and diffusion of the population.
The U.S was willing to help aid in South Korea, only to stop the North Korean's Aggression. While not directly committing forces to the conflict itself.
That the Homo Sapiens originated in Africa and spread throughout the whole world over millions of years and that (if I'm not mistaken), they breeded with Neanderthals