Social interaction with conspecifics (own kind) is very important. Rats display a wide range of social behaviours in which pheromones play an important role (see movie 1). Social ranking among rats is indicated by the degree of submissiveness an animal displays towards a cage mate during a conflict (i.e. lying flat on its back, see movie 2).
If you add a thousand times higher IQ by walking upright and using soap and understanding that helping each other is better than killing each other and competitive can get you further, if played fair to those basics, it shouldn't be that bad.
So, why did you start hard drugs three generations ago?
Loosing those percent.
Yours
Homo Lupos aka
The Under Dog