That's a very long time. The Sahara was a green paradise that long ago.
Evolution as conceived by Darwin originally had no preferred direction other than environmentally imposed ones, HOWEVER, it is very true that when our neocortex became capable of modeling the behaviors of each other (as well as anything else which interests us in nature), things changed miraculously, and for the most part, for the better. At that point, we ceased being reptiles (or at least, stopped behaving that way after our adolescence), and began acting as though a few of us had a genuine interest in the collective values of a civilized society. At least, some of us have.
This trend is likely not only to continue but to elaborate in the internet age. At least, I hope it does. It would be a better managed world that could get along without the wasteful practice of war, but no doubt not all of the choices that will need to be made for the survival of ourselves and the limited resources of this planet will be pleasant ones. For one thing, we are going to have to come to terms with the stresses we put on ourselves and our environment from overpopulation that makes us plunder more and more of our precious energy / food resources, and this will need to be done quickly if we don't wish to face a choice between starvation or cannibalism. Evolution could care less; don't blame natural selection for a choice we force on ourselves. That choice would be good news for people with sharp teeth, not much flesh on their bones, and who were nasty tasting to begin with. Silly? You bet it is.
What would be 'silly' would be to trash everything we have thus far been able to accomplish, because our collective will to stop the compulsions of those reptiles determined to destroy it is not strong enough. The reptiles had their shot, and are now extinct. Don't let them have another chance, or else the next asteroid with Earth's name on it will most certainly show them again how foolish that choice of destiny is.