Summarize changes in immigration policy and attitudes toward immigration since the 1950?

What was the first civilization name of the indians?

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.

What are some effects outside of europe because of world war 1?