>After World War II, a consensus about truth gave way to a consensus about the importance of consensus. The result was a liberal politics without principle that required an arbitrary (because without principle) and sometimes ruthless suppression of dissent. This consensus approach eventually encouraged a committed and sometimes fierce politics of conviction. Thus the turbulent 1960's and the culture wars of recent decades. That's the thesis of George Marsden's readable and insightful history of American liberalism, The Twilight of the American Enlightenment: The 1950s and the Crisis of Liberal Belief.