Posner — but equally it is
law intertwined in a “pragmatic” way (drawing on Michael Glennon’s excellent new book on this topic) with politics and diplomacy. The politics and diplomacy support the “
law” in good faith, but inform, alter, and shape it according to changing circumstances in the world. If one is “pragmatic” in that way, then “not legal [technically], but legitimate [politically]” makes perfectly good sense, whether one agrees with it as an
approach to international
law or not. It might not be one’s preferred
approach to international
law,...