Consider the positive feelings you experienced the last time when you did something good for someone else.
Perhaps it was the satisfaction of running an errand for your neighbor, or the sense of fulfillment from volunteering at a local organization, or the gratification from donating to a good cause. Or perhaps it was the simple joy of having helped out a friend.
This “warm glow” of pro-sociality is thought to be one of the drivers of generous behavior in humans.
One reason behind the positive feelings associated with helping others is that being pro-social reinforces our sense of relatedness to others, thus helping us meet our most basic psychological needs.