The Benjamin Franklin effect
Is a psychological phenomenon that causes us to like someone more after we do that person a favor: We justify our actions to ourselves, that we did them a favor because we liked them.
But the reverse effect is also true - we come to hate our victims, which helps to explain wartime atrocities.
1% better every day, gets you 1000% better very soon.
MORE LIKE THIS
The Benjamin Franklin Effect: How to Build Rapport by Asking for Favors
The Ben Franklin Effect and Cognitive Dissonance - Exploring your mind