Pluralism is the most important check on majority rule in the United States. Pluralism is seen throughout United States history. This concept refers to the competition caused by political parties who compete against each other. In our society, we have several different political parties who constantly challenge/compete with each other. A perfect example of this would be the US Congress. When Republicans are in the majority, the Democrats will ensure that this group is challenged by different ideas and viewpoints (and vice versa). This type of competition ensures that all political groups are held accountable to the citizens and also allows for different viewpoints to be heard/considered.