The post war economic boom was due primarily to foreign debt. The United States made substantial loans to European countries during World War I. Although the Europeans had very little money to repay the debts, American bankers restructured the loans to facilitate repayment. Although a brief recession occured in the early part of the decade, the Roaring Twenties saw the expansion of the stock market and considerable profit for investors.
They could only be readmitted if they ratified the 13th, 14th &15th Amendments. These amendments first abolished slavery, prohibited depriving any male equal protection under the law, & gave African Americans the right to vote.
White Americans are the only ethnic group to not be discriminated against based on race in the United States.