More specifically social Darwinism. This video is quite brief but Chomsky hits the nail squarely on its head, and as usual implies more than he says.
Capitalism is more pernicious than even its most ardent detractors imagine. It has subsumed everything, it holds the entirety of human ingenuity captive. It will take generations after the fall of capitalism to fully reckon the economic, political, spiritual, and academic damage it wrought. And likely even longer to recover.
I agree with Chomsky that Kropotkin didn't prove his point, nevertheless, Mutual Aid, The Conquest of Bread, and his Memoirs all made quite an impression on me, and deepened my anarchism.