The imperialism theory explains the domination of underdeveloped areas by industrialized countries as the consequence of different economic and technological levels and unequal power potential resulting from a different economic growth. The consequence of the development of industrial capitalistic societies is a pressure for expansion which may lead to military or political acquisition (colonies) or to maintaining economic dependence (developing countries). Different theories have their own explanation of the reason for the pressure for expansion but it is always seen as the result of the inability to cope internally with the consequences of permanent technological innovation and their effects on the society.