The text states "There was very little social mobility during the Middle Ages." What does this phrase mean

At the beginning of wwii, what action by winston churchill influenced hitler’s strategy?

“well,” he says, “there’s excuse for picks and letting-on, in a case like this; if it warn’t so, i wouldn’t approve of it, nor i wouldn’t stand by and see the rules broke—because right is right, and wrong is wrong, and a body ain’t got no business doing wrong when he ain’t ignorant and knows better. it might answer for you to dig jim out with a pick, without any letting-on, because you don’t know no better; but it wouldn’t for me, because i do know better.” the meaning in this excerpt is

In the period from 1860 to 1890, which experience was shared by most native americans living in western states?