This paper is a comparative study of main social theories of urban development in the last fifty tears. The author presents various approaches and social theories from across the world. He divides the after-war period into three phases according to the profound social changes. the first one covers the years of ending the post-war reconstruction of economy, infrastructure and cities damaged by the war. the second phase includes "the golden years" between approximately 1955 and 1975, when the formation of different types of welfare state, but mainly the urban population growth, suburbanization and metropolization processes and improvement of living conditions and urbanities took place. the third phase, covering the years between 1975 and 2000, is marked by the first signs of the decline of the welfare state accompanied by deepening social inequalities increasing urban poverty, marginalization of some groups of the population, political radicalization and urban conflicts as well as by urban and regional polarization.