Winston Churchill is best known as the greatest statesman of the 20th century.He was the prime minister of England. England was one of the United States's closest allies throughout the 20th century, and Churchill was a highly respected, successful leader, so Americans trusted his opinion of the Soviet Union when he spoke of the Iron Curtain in the 1940s.
It impacted politics in the mid-19th century because of the large inflows of immigrants after 1845 from cultures that were different from the existing American culture.
