Cogito ergo sum. Cynicism. Dialectical Materialism. Existentialism. The Socratic Method. Everybody knows what they mean. Or thinks they know what they mean. But do you have the back-up? 30-second Philosophies takes a revolutionary approach to getting a grip on the 50 most important and significant schools of philosophy. It challenges a half century of great thinkers to explain the most significant theories of philosophical thought in half a minute, using no more than two pages, 300 words and a metaphorical image.