David French in the NYT describes a moral center that is avoiding extremes on college campuses. French quotes from W.B. Yeats poem The Second Coming that was written in the period after the First World War during the Russian Civil War, when things appeared to be in disarray. "Things fall apart; the center cannot hold... The best lack all conviction/ while the worst are full of passionate intensity." The United States is built on a series of ideas from the Declaration of Independence, ideas that were revisited and relived at important times such as the Civil War with Lincoln and the Great Depression with FDR. It is that moral center that French speaks of when he cites Yeats and talks about it being challenged from extreme views on the right and the left in politics and in society.