Why did the Spiro people move out of Oklahoma?

Probably because they were forced to.

Explanation:

They were forced to moved out because after the Louisiana purchase people started moving west mostly the south after civil war

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.

c) many feel that their votes do not count eliminate