These definitions coincide with the terms which, since Greek antiquity, have been used to define the forms of government as the rule of man over man—of one or the few in monarchy and oligarchy, of the best or the many in aristocracy and democracy, to which today we ought to add the latest and perhaps most formidable form of such dominion, bureaucracy, or the rule by an intricate system of bureaux in which no men, neither one nor the best, neither the few nor the many, can be held responsible, and which could be properly called the rule by Nobody. Indeed, if we identify tyranny as the government that is not held to give account of itself, rule by Nobody is clearly the most tyrannical of all, since there is no one left who could even be asked to answer for what is being done. It is this state of affairs which is among the most potent causes for the current world-wide rebellious unrest.