What does a nation's fertility rate measure

Who's idea was it for businessmen to use their wealth for the greater good of society? (gospel of wealth ~ap u. s. history

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.

List of social classes of the shang dynasty in order ?