Write a summary of the following passage (Max 5-6 Sentences ).

Co - operation means working together  for the benefit of all. Without co-operation modern society cannot exist. Co-operation has been seen at its best among farmers in the dry regions of some parts of Australia and America. The fields have been irrigated in these regions. Crops cannot be grown without water. Water cannot be brought to the fields without streams being tapped higher up. For this purpose canals and dams have been built. The canals have been cut through the fields of moor than one farmer. Those who live higher up the valley then the others have allowed canals to be built through their land in order to carry water to the fields of farmers lower down.  In times of drought all are able to share the water. Instead, of talking all water for themselves the farmers on the higher land leave enough for their neighbours down the valley. Farming in dry areas has been made possible by such co-operation. By co-operation farmers have learned to make even the desert produce crops.