Estimates put the Earth’s human population at around 7.5 billion. I’m starting with that because while you or I might see a dead alligator on the side of the road and decide to either leave it there and move on or contact the municipal authority responsible for its disposal, 7.5 billion people means enough genetic and psychological variation that there’s a good chunk of people who would think very differently. (Truth be told, we probably know some of those people, and we have probably been asked to stop inviting them to nice events.)
Take, for instance, the unnamed Florida Gulf Coast students in this story.