The Great Plains were one. They hunted elk, bison, antelope, and etc..
Answer:
Abraham Gesner, geologist, author, chemist, inventor .
Explanation:
Gesner invented kerosene oil and, because of his patents for distilling bituminous material, was a founder of the modern Petroleum Industry.
By today's standards this period in the US wasn't very democratic, since minorities and women and poor people could not vote. It became less equal because of wealth disparities.