Compassion is a natural result of Empathy: those who feel as if their own a bit of other people's emotions don't want others to be unhappy if only because that makes them feel a bit unhappy themselves.

This also applies to positive emotions, so those with higher Empathy are more likely to want others to feel good as that makes them feel good hence their notion of A Better World also includes what's good for other people rather than purely what's good for they themselves.