Evidence suggests that approximately 30% of people think this way, which makes them a plurality in terms of their game-theoretic behavior. https://www.science.

Evidence suggests that approximately 30% of people think this way, which makes them a plurality in terms of their game-theoretic behavior. https://www.science.org/doi/10.1126/sciadv.1600451 https://www.science.org/doi/10.1126/sciadv.1600451