The human brain is a big believer in equality — and a team of scientists from the California Institute of Technology (Caltech) and Trinity College in Dublin, Ireland, has become the first to gather the images to prove it.
Specifically, the team found that the reward centers in the human brain respond more strongly when a poor person receives a financial reward than when a rich person does. The surprising thing? This activity pattern holds true even if the brain being looked at is in the rich person’s head, rather than the poor person’s.
– from Science Daily
From an evolutionary perspective, it is not surprising that we may be predisposed for justice. We are social animals, and in many cases, justice benefits the group as a whole.