What would (if given the opportunity) you do to benefit our species?

I'd go to college and learn all I could about physics, astronomy, ect so I could help expand our knowledge of the universe. With more and more minds working diligently on the same topics I think we'd eventually break barriers that are in place. Unfortunately there's so much of our society that only wants to do the bare minimum. What if we all had to do something constructive to benefit our society as a global community? What would you do?