Servius made yet a third division, quite distinct from the two we have mentioned, which became, in its effects, the most important of all. He distributed the whole Roman people into six classes, distinguished neither by place nor by person, but by wealth; the first classes included the rich, the last the poor, and those between persons of moderate means. These six classes were subdivided into one hundred and ninety-three other bodies, called centuries, which were so divided that the first class alone comprised more than half of them, while the last comprised only one. Thus the class that had the smallest number of members had the largest number of centuries, and the whole of the last class only counted as a single subdivision, although it alone included more than half the inhabitants of Rome.