Network analysis, writes one of its enthusiasts (Knoke 1990), “forms the cutting edge of theory and research” in political studies. “By uncovering these latent deep structures,” he continues:

These words epitomize the energizing vision of intellectual progress shared by proponents of network thinking. Similar statements could of course be quoted from proponents of countless other theoretical programs. But in the case of network analysis, such claims have recently won particularly wide assent among social scientists. For many, this relatively new theoretical program represents the state of the art, the clearest manifestation of the advance of knowledge in our disciplines.

For the purposes of this book, all of this holds much interest. Network thinking obviously embodies a distinctive model of closure in the sense discussed in Chapter 1. In the last decades of the century, it has attained intellectual sex appeal approaching that of structural functionalism in the 1950s.