I think the biggest mistake Humanity did was to spread all over the planet. By doing this we made the competitors the human race. The genocide we perpetrate on each other it's simply a continuation of the survival of the fittest. In our earlier generations of evolution War was common. Trafficking children to unite families also common. Our primitive aggressive human race divided us into countless factions and the war against the human race continues on. So by spreading all over the planet our only competition is one another and it is to the death. If we had United and stayed together on one continent the threat we face would have been from the evolution of the Predators maturity on the other continents around the globe. Our human race instead would have evolved working together to unite to defend against those predators. Our evolution would have been much much different and the strength we would have grown by bonding together miraculous in our achievements.