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.
From: The best resource I know google :3 Also from: https://www.scholastic.com/teachers/articles/teaching-content/origins-and-functions-political-parties/
Some early settlers were hunter-gatherers and hunted for their food and cloth, others were agrarian and farmed their food. Often times, these two type of societies would collide and, with the edition of trade, they flourished.