Answer:
In George Washington's first term, Jefferson was Sec. of State and Hamilton was Sec of Treasury. Washington and Hamilton saw things very consistently. Jefferson had a different view of things and went about trying to stop the progress of Hamilton's plans that Washington supported. After a while Jefferson couldn't take it any more, so he resigned from the cabinet. Although he professed that he just wanted to go back to his farm and leave politics, he never did. He encouraged surrogates, like James Madison to fight Hamilton/Washington's plans. Eventually, Jefferson took actions that made it clear that like-minded people needed to band together into a party to stop this implementation of plans that they disagreed with.
Hamilton had to defend his plans; and distortions that were making traction had to be addressed, so it did lead to two philosophical parties of thought. HamiltonRand@gmail.com