ملخص الدراسة:

There is an interactive and controversial relaionship that could be described as a direct on between the city as a fact characterized by urbanism on one hand and the demographic and urban increase on the other. When the relatives of the crowdedness decrease the degree of the urbanism becomes weak. It is found out that the demographic development and the centering of the services in the cities and capitals of the developing countries to which there will be migration, all these matlers will lead to increase the crowdedness.It is also noticed that there is a kind of diflerence between the advanced country that was able to face the urban challenges the main one among them is the crowdedness and the developing countries, among them the Arab countries which suffer from problems of crowdedness on the social and healthy services while on the level of the entire crowdedness and its containment it is found out that it is comprehensive in the advanced countries while it is reltive in the developing countries because it mostly prevailed the advanced countries and decreased in the developing countries in some of its main cities namely the capital ones.