Tyler Cowen, who is said to be “known as one of the libertarian world’s deepest thinkers,” recently wrote a blog post entitled “What Libertarianism Has Become and Will Become — State Capacity Libertarianism.” There, Cowen asserts that libertarianism “is now pretty much hollowed out,” because it has not been able to address an idiosyncratic list of problems ranging from climate change to improving K-12 education. Consequently, according to Cowen, “smart” classical liberals and libertarians “have evolved into a view, as if guided by an invisible hand.” This view Cowen dubs “State Capacity...