There's no such thing as the greater good in evolution, and humans aren't the goal. We're only one of millions of species, and we're fairly recent. Evolution isn't progressing toward any goal. It's just what can survive and reproduce, which changes depending on the environment. A large rocks slams into us tomorrow, or we have a runaway green house climate change, and the equation changes big-time for which organisms are fit.

The reason we have complex multi-cellular life forms on this planet is because the environment was stable enough to allow such a thing to happen. Bacteria and viruses might be the only life on a majority of inhabited planets.