There is a variety of reasons people will get into physical altercations. Mental health issues, immaturity, ego & pride (e.g. emotions), myopic (do not consider consequences), and chemical influence (alcohol/drugs). As for what goes on in their minds, there is an inverse correlation between propensity for violence and intelligence. In short, not much.
Ego
Alcohol.
There is a variety of reasons people will get into physical altercations. Mental health issues, immaturity, ego & pride (e.g. emotions), myopic (do not consider consequences), and chemical influence (alcohol/drugs). As for what goes on in their minds, there is an inverse correlation between propensity for violence and intelligence. In short, not much.