The International Criminal Court is preparing to adopt a vague and open-ended new definition of the international crime of "aggression" under which most U.S. administrations over the past half-century -- as well as those of many other advanced countries -- could be adjudged war criminals. Even "planning" a never-executed act of aggression could give rise to charges. [Michael Glennon (Tufts), Opinio Juris via Anderson, Volokh]