Talcott parsons provided one bridge between psychology and sociology by introducing what concept as a variable in frustration-aggression theory?

Talcott parsons connected the two fields psychology and sociology by adding the concept of social forces in frustration-aggression theory. Social forces are elements of society which is capable of making cultural change or influences on people which can possibly cause frustration-aggression.

Social forces

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.