Throughout the 1960s and 1970s, Tehran developed rapidly under Mohammad Reza Shah. Modern buildings altered the face of Tehran and ambitious projects were planned for the following decades. To resolve the problem of social exclusion, a first comprehensive plan was approved in 1968. The consortium of Iranian architect Abd-ol-Aziz Farmanfarmaian and the American firm of Victor Gruen Associates identified the main problems blighting the city as high-density suburbs, air and water pollution, inefficient infrastructure, unemployment, and rural-urban migration. Eventually, the whole plan was marginalized by the 1979 Revolution and the subsequent Iran–Iraq War.