Soon after the magazine Adbusters published an appeal to set up a "peaceful barricade" on Wall Street, Mr. Graeber spent six weeks in New York helping to plan the demonstrations before an initial march by protesters on September 17, which culminated in the occupation. It is far from clear, of course, how attuned the protesters are to the scholarship of Mr. Graeber, other critical theorists, or academics who study anarchism. A growing collection of fiction and nonfiction books, however, has a post-office box to which supporters are invited to send books. "The People's Library" in New York City, which has been copied at other Occupy protest sites, houses nearly 1,200 books in cardboard boxes that are protected against the elements by clear plastic sheeting. "I really am amazed for the respect they have for the word," Eric Seligson, the librarian at the protest site on Wall Street, told Esquire. "There's a real reverence for what has been written that has surprised me, since they eschew whatever came before, all the thought that came before." The defining aspect of Occupy Wall Street, its emphasis on direct action and leaderless, consensus-based decision-making, is most clearly embodied by its General Assembly, in which participants in the protest make group decisions both large and small, like adopting principles of solidarity and deciding how best to stay warm at night.