The one-party Era of Good Feelings system of cooperation between politicians lasted only about a decade. It was replaced by a new two-party system, which continues to today. Political parties took on the job of building coalitions between many different groups with different interests. This new system broke away from the patronage system based on personal loyalties. The Founding Fathers of the United States had never imagined a system based on political parties but by the 1830s they had become the main system of American politics.