Evolution functions at the level of populations, not individuals. The individual's mandate is always simply to lead their best life. Evolution is a phenomenon that happens on top of that but defines it. Letting go of your dreams of long-run impact on the world's gene pool is just as important as letting go of your dreams about being the greatest entrepreneur of all time. Those dreams are probably making you miserable without improving your life.

As far as capitalism, I disagree. To whatever extent modern capitalism cares about people, it cares enough about mediocre ones to let most of them live modern, comfortable lives in today's society.