Political movement

A  is a collective attempt by a group of people to change or.

Quotes

 * All political movements are like this — we are in the right, everyone else is in the wrong. The people on our own side who disagree with us are heretics, and they start becoming enemies. With it comes an absolute conviction of your own moral superiority. There's oversimplification in everything, and a terror of flexibility.
 * Doris Lessing, as quoted in "A Notorious Life" — interview with Dwight Garner at salon.com (11 November 1997)