How did buying on margin affect the u. s economy in the future.

I think this might help not to sure

The "buy now, pay later" method of credit was introduced to the stock market as "buying on margin." The deal was to put some of the money down, then pay for the rest of the shares with profits when the paper was sold. ... As more people bought stocks with borrowed money, the demand for stocks increased - as did the prices.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.