No very sharp line can be drawn between social psychology and individual psychology.
In wartime we identify ourselves with the nation, and its interests are the interests of our primal selves.
Social psychology has, as a rule, dealt with various phases of social experience from the psychological standpoint of individual experience.
Man lives in a world of meaning.
A multiple personality is in a certain sense normal.
Take the situation of a scientist solving a problem, where he has certain data, which call for certain responses. Some of this set of data call for his applying such and such a law, while others call for another law.