Indeed mothernature was in control of human evolution. Now it is time for man to play God once again. The Human Genome Project
was a joint scientific project that began in 1990 cooridnated by the U.S. Department of Energy and the National Institutes of Health. The project was supposed to last a span of 15 years but as science progresses funeral by funeral, the effort was completed in 13 years instead.
They now have a blueprint for building a human being. Scientists are now in control of human evolution, if not now they will be soon enough.
I'd also recommend reading More Than Human: Embracing the Promise of Biological Enhancement
by Ramez Naam.