Sumerians built ziggurats because they believed that they would be more closely connected to the heavens. They believed that ziggurats connected the earth and the heavens.
The main world leaders at the time were
Hitler - Germany
Franklin D. Roosevelt - USA
Mussolini - italy
Churchill - Britain
stalin- russia
He was in office from 1929 to 1933 and served as a reform Governor, promoting programs to combat the economic crisis besetting the United States at the time. In the 1932 presidential election, Roosevelt defeated Republican President Herbert Hoover in a landslide.
plants, animals, culture, human populations, technology, and ideas between the Americas, West Africa, and the Old World in the 15th and 16th centuries