Drucker, management guru, social ecologist, and probably the most influential author in my life, passed away, fittingly on Rememberance Day, November 11, 2005. He was the king of communicating complex issues. In my opinion, his first 4 books (The End of Economic Man, The Future of Industrial Man, The Concept of the Corporation, and The New Society) remain some of the most insightful political and social commentary since Marx.
Obitutaries from the NY Times, Financial Times, BusinessWeek, and Bloomberg.