Essays worth mapping

When I get some spare time -- ha! -- I plan to produce argument maps of some of the better essays (or excerpts thereof) that I can lay my hands on. Here is a list of a few that I came across recently:

• Knuth on Software Patents: An open letter to the Commissioner of Patents and Trademarks from one of the great originators of ideas about algorithms
  
• Henry Hazlitt, Economics in One Lesson: Most physical scientists assume that there isn't much to Economics, so let's get it out the way quickly!
• Stewart Brand, Environmental Heresies: A legendary environmentalist examines several issues that the environmental movement may well reverse its stance on in the next decade