They bought Republican ideas to southern politics.
I know its a late answer but the discovery of machines. It helped create things faster.
It was stock market "speculation" that contributed the most to the Depression of 1920-21, since the value of many companies became incredibly inflated--leading to a "bubble" that eventually burst in 1929.
Answer:
No, they didn't have the right to invade Native American territory and steal their land. It was all because of racial outlooks the white southerners had on the Native Americans. The Native Americans did nothing wrong to them they just wanted to invade whatever land they can.
