Ibn-i-Khaldun looks at the problem in a psychological-cultural context. He asserts that when a ‘group-feeling’ becomes strong enough in a human group, the empire is bound to rise. When this group-feeling gradually weaken due to luxuries of civilised life in cities, the empire gradually steeps in decline. However, he makes the observation in line with Spengler that the ‘rise and fall’ is a cyclical process. It takes approximately 300 years for a dominant empire to decline and decay.