This interplay between brain regions allowed them to identify the underlying motives.
This means that they are more interested in helpfulness, honesty, forgiveness and justice than in money, fame, status and power. The same occurred after the earthquake, tsunami and nuclear meltdown in Japan in He would have been altruistic in battle too, particularly when warring with other groups.
As Johnson explains, selfishness is considered far from a virtue in such tribal groups, which still live in ways similar to our hunter-gatherer ancestors. After activating the empathy motive, selfish individual resembled persons with prosocial preferences in terms of brain connectivity and altruistic behavior.
Science, ; : DOI: How would the hard logic of evolution produce such outcomes?
These motives could not be uncovered by observing the person's choices, or based on the brain regions that are activated during the decision-making.