Here’s a depressing fact.
[In Britain] in a 2005 BBC Radio poll  listeners voted Karl Marx "the greatest philosopher of all time."…. Marx received 28 percent of the votes cast, more than Socrates, Plato, Aristotle, Aquinas, and Kant combined. David Hume came second with 13 percent.
This from page 92 of Tony Judt’s essay "Goodbye to All That?" appearing in the latest issue of The New York Review of Books  (Sept. 21, 2006).