The answer to your question is yes, and no. Yes they are connected but they are also different behavioral science disciplines. There is psychology, sociology and social psychology.
The third one is where the two meet and are interconnected. Social psychology tries to determine the origins of cultures and behaviors that can come from those cultures. They try to determine why radical Islam was allowed to develop as well as why Americans are independent to the point of walking away from relationships.
Social psychology is more concerned with the effects that environment has on one's behavior, and less on the behavior itself. To me, social psychology exists to help stop many behaviors by fixing the root cause. Drop-out rates in inner city schools may be high because there is not reinforcement in the home.
Why are Japanese children expected to do better than Mexican children in school? The different options for research, study, and resolution are only limited by the person who is doing the studies. Psychology is directly concerned with behaviors, although there is interest in where the behaviors originated, they are more interested in fixing the behavioral problems than the environmental causes.
Sociology is directly concerned with cultures, how they work together, and how they may be resolved for the betterment of the world. Social psychology merges those two together so they are connected. To learn about social psychology, visit your local library and peruse the shelves.
Check out a few and see which one makes the most sense to you. Once you've found one that you think you will like, then visit Barnes and Noble or other book stores, either brick and mortar or online, and search for the title you like.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.