Helots and the impoverished poor whites successively became chattels. Sparta could only muster seven hundred citizens against Epaminondas at Leuctra. During the period between Herodotus and Aristotle the number of citizens was reduced to little above one thousand. At the Macedonian conquest, Sparta averaged fourteen chattels for every three freemen. One hundred years after Aristotle, under King Agis, about two hundred oligarchs constituting the body politic, the citizens of Sparta owned nearly all the lands of Laconia, and worked them by chattels. This numerical reduction of citizens and deterioration of their historic character principally affected the military standing of Sparta. Causes so obvious as not to require explanation prevent at present a similar diminution of the number of Southern oligarchs, notwithstanding the existing numerical disproportion between them and the non-slaveholding whites, whose political freedom, to a rational appreciation, is rather nominal than real. The disease is the same--its workings alone are different. The sword was the soul of Spartan institutions: the pure and elevated conception of the American social structure rests not on physical but on intellectual and moral force; but its deterioration is visible in the new conception of slavery inaugurated and sustained by the militant oligarchs. The process of moral and intellectual decomposition in the South would be still more rapid but for the various influences from the Free States, which, like refreshing breezes, fan its fainting energies. The sword, it is true, may have decimated whole Spartan communities; but such losses were supplied from the class of the Periokes and other freemen, and even sometimes from the Helots. Domestic slavery devoured the small estates, degraded the freemen, and dried up the sources of political renovation. Five thousand Spartans fought at Plateæ, which gives a total population of about forty thousand. The number of Helots owned by them at that time amounted to one hundred and seventy-five thousand. Subsequently, after the Peloponnesian and Macedonian wars, these Helots were transformed into chattels, and the degenerate Spartans attempted to transform the Periokes into Helots, but made them simply deadly enemies. Almost in proportion as the Spartan oligarchs increased in wealth and possessions, not only did the number of Helots and slaves increase, but military ardor decreased. At Leuctra, Sparta hired her cavalry; and soon after, Sparta, rich in Helots and chattels but poor in citizens, was forced passively to witness the curtailing of her frontiers by Philip of Macedon.