Any action, or, behavior, that violates, or goes against, actions (or behaviors) that have been socially normalized
Answer:
The modern two-party system consists of the "Democratic" Party and the "Republican" Party. ... These two parties have won every United States presidential election since 1852 and have controlled the United States Congress since at least 1856.
Groupthink. According to Wikipedia, groupthink is “a psychological phenomenon that occurs within a group of people in which the desire for harmony or conformity in the group results in an irrational or dysfunctional decision-making outcome.”