Who can help me with political science?

I need help with my political science homework...I can't seem to pinpoint it, I need to discuss laws, amendments, and actions that the US federal government enacted between the Reconstruction period and end of World War II. I also need some good examples of cases, legislation and social movements dating from WWII to present day and how they affect current United States relations. Anything will help. I know I sound like an idiot, but usually I do well in other classes except American History and Political Science...I just can't make it stick in my head.

Legislation and social movements that affect relations today?

- Roe V. Wade (Abortion legislation)
- Jim Crow laws (segregation social movement)
- The Civil Rights Act (another social movement/segregation law)
- the PATRIOT act

It's a start. It's all I can come up with off the top of my head.

Oh, and now I have to lock this because it's asking for homework help, which we don't allow. But I had to answer it, because it interests me!