Hamilton and other leaders who wanted a strong central government banded together to put over their policies. In 1787 they began calling themselves the Federalists. This was the first United States political party. In 1796, anti-Federalists gathered around Jefferson.
The Cold War developed in the Soviet Union, Europe, and the United States due, in large part, to the competition over the arms race and over scientific advancement during the 1970s and 1980s. The Soviet Union pursued communist ideas while the United States and Western Europe followed democratic principles. The Cold War developed as each built up it's military to protect and advance it's own ideology.