 Korotayev has also done (together with his colleagues Vladimir Klimenko and Dmitry Proussakov) a significant contribution to the study of the origins of Islam.Korotayev and his colleagues view the origins of Islam against the background of the 6th century Arabian socioecological crisis whose model is specified by Korotayev and his colleagues through the study of climatological, seismological, volcanological and epidemiological history of the period.They find that most sociopolitical systems of the Arabs reacted to the socioecological crisis by getting rid of the rigid supratribal political structures (kingdoms and chiefdoms) which started posing a real threat to their very survival.