Now, just as the earliest account of the nature of the progress of humanity is to be found in Plato, so in him we find the first explicit attempt to found a universal philosophy of history upon wide rational grounds. Having created an ideally perfect state, the philosopher proceeds to give an elaborate theory of the complex causes which produce revolutions, of the moral effects of various forms of government and education, of the rise of the criminal classes and their connection with pauperism, and, in a word, to create history by the deductive method and to proceed from A PRIORIpsychological principles to discover the governing laws of the apparent chaos of political life.
There have been many attempts since Plato to deduce from a single philosophical principle all the phenomena which experience subsequently verifies for us. Fichte thought he could predict the world-plan from the idea of universal time. Hegel dreamed he had found the key to the mysteries of life in the development of freedom, and Krause in the categories of being. But the one scientific basis on which the true philosophy of history must rest is the complete knowledge of the laws of human nature in all its wants, its aspirations, its powers and its tendencies: and this great truth, which Thucydides may be said in some measure to have apprehended, was given to us first by Plato.
Now, it cannot be accurately said of this philosopher that either his philosophy or his history is entirely and simply A PRIORI. ONEST DE SON SIECLE MEME QUAND ON Y PROTESTE, and so we find in him continual references to the Spartan mode of life, the Pythagorean system, the general characteristics of Greek tyrannies and Greek democracies. For while, in his account of the method of forming an ideal state, he says that the political artist is indeed to fix his gaze on the sun of abstract truth in the heavens of the pure reason, but is sometimes to turn to the realisation of the ideals on earth: yet, after all, the general character of the Platonic method, which is what we are specially concerned with, is essentially deductive and A PRIORI. And he himself, in the building up of his Nephelococcygia, certainly starts with a [Greek text which cannot be reproduced], making a clean sweep of all history and all experience; and it was essentially as an A PRIORItheorist that he is criticised by Aristotle, as we shall see later.
To proceed to closer details regarding the actual scheme of the laws of political revolutions as drawn out by Plato, we must first note that the primary cause of the decay of the ideal state is the general principle, common to the vegetable and animal worlds as well as to the world of history, that all created things are fated to decay - a principle which, though expressed in the terms of a mere metaphysical abstraction, is yet perhaps in its essence scientific. For we too must hold that a continuous redistribution of matter and motion is the inevitable result of the nominal persistence of Force, and that perfect equilibrium is as impossible in politics as it certainly is in physics.
The secondary causes which mar the perfection of the Platonic 'city of the sun' are to be found in the intellectual decay of the race consequent on injudicious marriages and in the Philistine elevation of physical achievements over mental culture; while the hierarchical succession of Timocracy and Oligarchy, Democracy and Tyranny, is dwelt on at great length and its causes analysed in a very dramatic and psychological manner, if not in that sanctioned by the actual order of history.
And indeed it is apparent at first sight that the Platonic succession of states represents rather the succession of ideas in the philosophic mind than any historical succession of time.
Aristotle meets the whole simply by an appeal to facts. If the theory of the periodic decay of all created things, he urges, be scientific, it must be universal, and so true of all the other states as well as of the ideal. Besides, a state usually changes into its contrary and not to the form next to it; so the ideal state would not change into Timocracy; while Oligarchy, more often than Tyranny, succeeds Democracy. Plato, besides, says nothing of what a Tyranny would change to. According to the cycle theory it ought to pass into the ideal state again, but as a fact one Tyranny is changed into another as at Sicyon, or into a Democracy as at Syracuse, or into an Aristocracy as at Carthage. The example of Sicily, too, shows that an Oligarchy is often followed by a Tyranny, as at Leontini and Gela. Besides, it is absurd to represent greed as the chief motive of decay, or to talk of avarice as the root of Oligarchy, when in nearly all true oligarchies money-making is forbidden by law. And finally the Platonic theory neglects the different kinds of democracies and of tyrannies.
Now nothing can be more important than this passage in Aristotle's POLITICS (v. 12.), which may he said to mark an era in the evolution of historical criticism. For there is nothing on which Aristotle insists so strongly as that the generalisations from facts ought to be added to the data of the A PRIORI method - a principle which we know to be true not merely of deductive speculative politics but of physics also: for are not the residual phenomena of chemists a valuable source of improvement in theory?
His own method is essentially historical though by no means empirical. On the contrary, this far-seeing thinker, rightly styled IL MAESTRO DI COLOR CHE SANNO, may be said to have apprehended clearly that the true method is neither exclusively empirical nor exclusively speculative, but rather a union of both in the process called Analysis or the Interpretation of Facts, which has been defined as the application to facts of such general conceptions as may fix the important characteristics of the phenomena, and present them permanently in their true relations.
