Good book. Ibanez traces anarchism in its many different forms throughout the years, with a focus on how anarchists adapt to the changing power structures to stay relevant.
A really optimistic book about the regrowth of the anarchist movement and how it is an inherently fluid movement. Social movement must be constantly changing and adapting to keep up with the times, which are also rapidly changing. Horizontal ungovernability is the future, but also, we have to create the future, right here, right now, if it's ever going to really exist. He also does a really good job of explaining modernism, postmodernism, structuralism, and poststructuralism in here.