Since Duck of Minerva doesn't seem to have picked this up, I figured I'd link to it: here.
Rosenau was a prolific IR scholar who had a long career, ranging from foreign policy analysis (early on) to, later, big-picture theory focusing on the roles of non-state actors and individuals in a globalized world. His later work uses concrete examples, often culled from journalistic sources, to illustrate broad concepts (sometimes designated with neologisms, e.g. fragmegration). Several of his books are on my shelves: Turbulence in World Politics (1990); Along the Domestic-Foreign Frontier (1997); and the 1969 volume he edited with Klaus Knorr, Contending Approaches to International Politics, behind whose bland title lie the key pieces in what is sometimes referred to as the 'second great debate'. [added later]: I also recall an article of his from the '80s on 'habit-driven' actors. [added still later]: I also have Czempiel & Rosenau, eds., Global Changes and Theoretical Challenges (Lexington Books, 1989).
P.s. Another recent passing, completely unrelated: here (via A. Rudalevige at The Monkey Cage).