Ben Franklin effect
n.— «Giving can lead to other forms of involvement: Volunteering, advocacy. And vice-versa. It’s called the Ben Franklin Effect. Because Franklin once said: He that has once done you a kindness will be more ready to do you another, than whom you yourself have obliged.”» —“The more they give, the more they love you” by Jeff Brooks Donor Power blog Nov. 2, 2005. (source: Double-Tongued Dictionary)
Further reading
Astronauts returning from space say they experience what’s called the overview effect, a new understanding of the fragility of our planet and our need to reflect on what humans all share as a species. A book about the end of the universe...