6. Again, a pastoral life being abandoned, the people gathered for various reasons in towns, and cities were built up, where the original style of government became impossible, from the mixed character of the population; the oldest, or family government, being founded on relationship and traditional respect. The need of leadership and the service rendered by some member of the community founded a despotic authority. In many cases a city was founded by an adventurer who had gathered supporters around him by some special ability, or by some accidental pre-eminence, as we see in Nimrod and Romulus; or, as often occurred, the head of a family or tribe which forsook the pastoral life and founded a city, from a patriarch or chieftain became a king. Government, in early times, was very imperfectly organized. It gradually advanced with some people to a high point; while with others it continued in a very undeveloped state for long periods—some races never having reached any high stage at all, or only temporarily under some talented individual. The first settled governments are found in fertile river valleys where the cultivation of the soil arrested roving and desultory habits, and often formed the nucleus of an empire. There is reason to believe that the first emigration from the early home of the race was toward the east, that a state was soon formed in China which became considerably civilized and fairly well organized the earliest of all. Their national traditions and some of their recorded dates claim a vast antiquity. It is not yet determined by scholars how much credit is to be allowed to these claims. 7. As it appears at present, two other governments were organized at nearly the same time, one in the lower valley of the Euphrates and the other on the Nile. It is also possible that a fourth was built up in India nearly cotemporary with these. Certain similarities between the ancient ruins of Egypt and India, and the traditions in the latter country have given rise to the suspicion; but no certainty has yet been reached. Several systems of chronology, independent of each other, are found in Egypt, all agreeing as to its enormous antiquity, but disagreeing in some important points, and satisfactory tests have not yet been met with, so that the early days of Egypt are very obscure. The evidences of a clearly defined progress are presented in its monuments, but the earliest bear so strong a resemblance to the later that there is some reason for supposing that the first inhabitants had reached a considerable degree of maturity before settling there. As yet, however, that point is only an inference—the most probable escape from a difficulty. The empires established on the Euphrates, and north of that on the Tigris, mark the steps of progress very distinctly, and furnish fairly satisfactory means of computing their general chronology.