[Mises criticises Oswald Spengler] for this polylogist view that people have different sorts of logic and different patterns of thinking. For example, Spengler held that the Greeks had a completely different view of space and time from that characteristic of western man. Greeks didn't have the notion of infinity. (...) Mises asks the basic question - if these cultures are supposed to be different, they have all these very different ways of looking at the past and they have different kinds of thought, how is it that Spengler himself is able to understand all these different patterns? He's limited to his own culture - that of contemporary western man. So how is it, on his own system, that he's able to understand all these different cultures?