Because that's how you get the great depression
The Urban league was formed September 29, 1910. It was formed to open barriers to black employment. National Urban League is the largest and oldest community based civil right organization in the US. Its stated mission is to enable African Americans secure economic self reliance, parity, power, and civil rights.
The first man who was shot in the American Revolution and was also the first African-American who organized other blacks to the cause of American Independence.
In the south, paramilitary groups aimed at undoing reconstruction overthrew elected governments in a movement/process they called?
"Redemption"
The Columbian Exchange greatly affected almost every society on earth, bringing destructive diseases that depopulated many cultures, and also circulating a wide variety of new crops and livestock that, in the long term, increased rather than diminished the world human population:)