For a long time theories of history of the speculative sort have been out of favour. Accounts of the whole sweep of human history, like Hegel's, or even of more limited historical cycles, like Spengler's or Toynbee's, have been found much too grand for the workaday historian and have smacked too much of apriorism for post-positivist philosophy. Consequently, few take them seriously or treat them as more than fanciful aberrations which may serve as useful examples of how not to proceed in history or philosophy.