not really. I think that you have been misguided as to how evolution works. basically the principle is that differences in individuals in a breeding population lead to cetain individuals having more children than others. This means that on average, the population will become more like them. This is called differential reproductive success (natural selection is included in ths). mutations may also occur which create more variation in the population, and these might be either beneficial or detrimental. Now as for humans we are not entirely sure what the environment was that resulted in selection for our traits, and it is bound to be quite complex anyway. clearly one of the important dactors was bipedality - standing on two legs, since this is seen in the earliest homimid ancestors such as Lucy. Bipedality has a few advantages that we know of, for one thing, it is more energy efficient than knuckle walking, enabling the new bipeds to be able to cover longer distances along flat terrain. Bipedality also frees up the hads for other things, such as throwing rocks and stuff like that, which may have been very useful against predators. These changes were occuring around the same time that the forest was receeding on the african plains, and turning into the savannah that e see today. The forest existed mostly as little islands with large open spaces between them. The differential reproductive success I spoke of earlier will have acted in favour of those who could survive in this sort of environment. The rise of intelligence and so on will have come later, along with tool making and so on, which again gave those with the ability, a better advantage over those who did not have it. i.,e. if you can make a sharp stone, you can not only scare a predator, but might kill it too, or you can use it to injure prey while it is quite far away and then using those awesome running skills (humans have the best long distance stamina of any animal) you can follow the prey while it bleeds to death. (many of the ealiest tools were like bladed frisbees)
this is just some of the early stuff, but I hope it helps dispel a few of the myths about how evolution progresses, that you seem to have aquired.