The Seattle longitudinal study of cognitive development discovered that among older people (d.) higher socioeconomic status is associated with higher levels of intellectual functioning. Interacting socially and economically is a great factor in keeping up your intelligence up to date.
The North came out in relatively good condition. This is speculated to be due to the war being fought mostly in the south and that the north won, and when you see how the south was left in shambles, you can assume that the North was having a great time post-civil war.
Title IX of the Education Amendments Act of 1972 is a federal law that states: "No person in the United States shall, on the basis of sex, be excluded from participation in, be denied the benefits of, or be subjected to discrimination under any education program or activity recieving Federal financial assistance.