Most books are written with a clear statement in mind, usually in the space of a few years, as if to emulate a thought that unfolds as a continuous and unbroken element. This book is not among them. Rather, it has been patiently assembled from a series of public lectures, articles, essays, and chapters either written or delivered over the first decade of the millennium, falling roughly between the spring of 2002 and fall of 2012, all of which address the internal logic of what I call “the return statement” in contemporary philosophy....