Like in any other sector, non-profits, charities and social enterprises find themselves competing. But when the line between friendly rivals and enemies is unclear, how dangerous is this competition?

To tackle societal problems we need more social enterprise and more social innovation, and we also need to understand in the simplest of terms why they are differents says Nathaniel Smith.

Science-backed evidence shows sex, survival and the search for an excellent mate could be what drives social entrepreneurs. Nathaniel Smith investigates.