When an opinion has taken root in a democracy and established itself in the minds of the majority, it afterward persists by itself, needing no effort to maintain it since no one attacks it. Those who at first rejected it as false come in the end to adopt it as accepted, and even those who still at the bottom of their hearts oppose it keep their views to themselves, taking great care to avoid a dangerous and futile contest.

Book Three, Chapter XXI. - Democracy in America, Volume II (1840)