Let's just do the first substantive paragraph of an idiotic essay entitled "Is It raining Libertarians, or what?"
Out of their experience after the Civil War, America's Republicans came to believe in a philosophy called Social Darwinism, with its call for individual self-reliance, free markets and limited government. Most Americans who rejected Social Darwinism became DemocratsAh, well, this would be interesting if it were at all remotely true.
The Republican ideology of individual self-reliance, free markets, and limited government predated the Civil War. In modern terms, this is called "Free Labor Ideology," and the ground-breaking research on that was done by Eric Foner twenty-six years ago in Free Soil, Free Labor, Free Men, The Ideology of the Republican Party Before the Civil War.
The generalized breakdown between Social Darwinists in the GOP and those the author will later refer to as progressives never actually occurred--at least not in the way he suggests.
The identification of Herbert Spenser as the Father of Social Darwinism was an intellectual construct created by Richard Hofstader in 1944. While Hofstadter's thesis was influential for several decades, it has been pretty thoroughly debunked.
But, hey, this is an election year, so it is fair game to say anything, right?