Answer:
the relative deprivation principle
Step-by-step explanation:
Relative deprivation theory or principle: Developed by Samuel Stouffer during World War II.
Relative Deprivation Theory: The theory explains the view of social movements and change, in which different individual takes action for a social change to obtain something like status, wealth, etc that other individual already have and they tend to believe that they should possess too.
In other words, everyone is surrounded by people whom they idealize and with whom they compare themselves and relative deprivation occurs when a person feels inferior to the person he or she idealizes and this often leads to aggression and frustration.