Class character of Ancient Civilisation

Civilisation first grew up in four places.
1. North Africa,
2.West Asia,
3. India,
4.China
The natural condition of Egypt and Mesopatamia was very fertile. The lower point where the two rivers Tygris and Euphrates met was known as Sennar. At that place the Tribes Sumer lived in 4000 to 5000 BC. The land of Sennar became fertile due to the flood of sea. they were accustomed with irrigation by constructing dams and canals. the labourers were free from exploitation as at present. There was no master and no exploitation.All the works were done by the labour of all the persons of the community. Redistribution of land was done, if necessary. The best lands were given to the old and leaders of the community. These lands were inherited by their next generation. During the next time of redistribution, these lands remained to the owners as it was. The priests were also allotted the best lands.By removing  water from the swampy lands, they extended their lands an for this purpose they utilised the labour of the poor section of the community. Some people took loans from these leaders, priests or old in their distress condition which they could not repay .Thus these people became landless and converted to land-slaves.
Sometimes the tribes of the hilly sides attacked the people of the plain land. In war fare the lod people and the leaders of the community participated. They usually used weapons made up of Bronze. The ordinary farmers could not participate in the war. Gradually the war became their monopoly. Thus they became the king of the community.