The Soviet Union dominated politics in eastern Europe
About 35 years. Genghis Khan created the Mongol empire in 1206. By the 1230s Batu Khan invaded Russian and Bulgarian lands. In 1241 at the battle of Mohi Batu Khan defeater a combined German, Polish and Hungarian army. Further expansion ceased do to the death of Ogedei Khan. Batu Khans attention was turned to succession instead of invading Western Europe.
Recruitment by the railroad companies
As all trade networks did, the Indian Ocean trade fostered the exchange of ideas, such as Buddhism to Southeast Asia, and Islam across Eurasia.
Answer:
Keeps the government more balanced and keeping the president from having too much power. Decisions are made by senate and the house of representative which is made up of a lot of people so the best decisions are made. The main purpose is to limit the power of the government and provide more power to the people.