By no means perfect, but a valiant attempt to make realism and IR theory more broadly relevant to the 21st century international system. The central metaphor of entropy in thermodynamics was interesting but could have been presented in a more condensed form. Also, the section on the microfoundations of the new order - information overload, etc. at the individual level - was a bit too newsy and could have worked more to make the links between the microfoundations and state behavior clearer. Still, this is an important book, and I hope others follow in Schweller's footsteps.