Evolving is inescapable methinks. However the direction? Perhaps we have some control of that. Evolve into more or less? Your direction?

Evolution, although a proven scientific fact of life existence is an extremely very complex issue which why it still officially a theory and not 'Darwin's Law of Evolution'  yet.

Species usually evolve 'more' in order to survive more efficiently somehow. But, however if we stopped using some part of our brain for some reason then that part of the brain would probably shrink itself out of existence. De-evolving.