Edmund Barton. He was the prime minister from 1901 - 1903.
United States did not like communism in the 50's and 60's. So they fought proxy wars with the U.S.S.R., now dissolved in to different countries.<span />
It was a step towards racial equality and a major point in the Civil Rights Movement. Although it took the Voting Rights Act to finally enforce it, African Americans were supposed to be citizens with the right to vote since the passage of the 14th and 15th Amendments to the Constitution.
I'll answer just your first question. On Brainly, it's good to post separately for each question you have.
In the 1920s, people were so eager to invest and earn profits through the stock market that they bought stocks "on margin." In other words, they paid for only a marginal percentage of the stocks with their own funds, and borrowed bank funds for the rest of the purchase. By the late 1920s, 90% of the purchase price of stocks was being made with borrowed money. This inflated the market in a way that spiraled out of control, and in 1929 the market crashed.
In response to the market crash and the beginning of the Depression, the Smoot-Hawley Tariff (officially the Tariff Act of 1930) tried to protect American jobs by imposing heavy tariffs on imported goods. But what this did was to provoke other countries to impose their own tariffs as a response. As a result, world trade was greatly diminished and the Depression spread globally.