From Morrison's new Columbus book

This is primarily an effect of the Calvinist Puritan roots of American progressivism. Just as Calvinists believed in the centrality of the depravity of man, with the exception of a minuscule contingent of the Elect of God, their secularized descendants believe in the depravity and cursedness of Western civilization, with their own enlightened selves in the role of the Elect. http://bit.ly/c9mxzn