I have on several occasions told the story of how I came to choose the title In Defense of Anarchism for what turned out to be my best known book. When asked by Hugh van Dusen at Harper TorchBooks to find a better title for the essay than "Political Philosophy," which was what it was called when I wrote it, through my mind flashed an essay by Mark Twain called "In Defense of Harriet Shelley," and I adapted its title to my purposes. Today, while reading Louis Liebenberg's The Origin of Science, which traces the evolved human capacity for scientific reasoning to the modes of thinking used by pre-historic animal trackers on the African savanna, I discovered to my chagrin that Twain was himself playing on the title of a famous essay by Percy Bysshe Shelley [famous to everyone but me, that is] called "A Defense of Poetry."
So, forty-five years late, I have discovered the real source of my title. I think if I had it to do over again, I would go back and get a decent education.