Pluralistic ignorance
In social psychology, pluralistic ignorance is a situation in which a majority of group members privately reject a norm, but go along with it because they incorrectly assume that most others accept it. This is also described as "no one believes, but everyone thinks that everyone believes". In short, pluralistic ignorance is a bias about a social group, held by the members of that social group.
Pluralism (political philosophy)
As put by arch-pluralist Isaiah Berlin, "let us have the courage of our admitted ignorance, of our doubts and uncertainties. At least we can try to discover what others [...] require, by [...] making it possible for ourselves to know men as they truly are, by listening to them carefully and sympathetically, and understanding them and their lives and their needs... ." Pluralism thus tries to encourage members of society to accommodate their differences by avoiding extremism (adhering solely to one value, or at the very least refusing to recognize others as legitimate) and engaging in good faith dialogue. Pluralists also seek the construction or reform of social institutions in order to reflect and balance competing principles. One of the more famous arguments for institutional pluralism came from James Madison in "The Federalist" paper number 10. Madison feared that factionalism would lead to in-fighting in the new American republic and devotes this paper to questioning how best to avoid such an occurrence. He posits that to avoid factionalism, it is best to allow many competing factions (advocating different primary principles) to prevent any one from dominating the political system. This relies, to a degree, on a series of disturbances changing the influences of groups so as to avoid institutional dominance and ensure competition. Like Edmund Burke, this view concerns itself with balance, and subordinating any single abstract principle to a plurality or realistic harmony of interests.