Diogenes of Sinope, a beggar who lived on the streets of Athens in the fourth century B.C.E., has been hailed as the progenitor of performance art, an inspiration for the Occupy movement, and, by the ...

Let's be honest. When most of us talk about philosophy — the hard-core, name-dropping, theory-quoting kind — we're talking about a particular lineage that traces back to the Hellenistic Greeks. But ...