I have a PhD from the same private, research extensive university that Dr. Drucker was affiliated with and where the university's school of management is co-named after him. I believe that his "Western foundations" conclusion is somewhat problematic for people with cultures from Asia and Africa, because many cultures predate Europe, and some of these cultures now also influence many Western knowledges.
The peril of a sole "Western foundations" point cannot be emphasized enough, because it is quite likely that most people are not aware of how widespread institutions are that overtly and covertly buttress these foundations -- from professional sports to the judicial system to images of Christ to research -- while at the same time invalidating the cultural and leadership foundations of non-Europeans.
KOH PhD (Ife Ukwu)