Imperialism 

Capitalism cannot grow in isolation; thus it must have control with non-capitalist regions in order to progress. Imperialism is plausible, when there is a presence and segregation of so-called First World capitalist countries and Third World, non-capitalist countries that are placed in the international power hierarchy. In addition, the presence of developed economies that deviate from neoliberalism and imperialism encourages imperialist centers to seek the domination of these economies.

This explains the wars and the struggle for hegemony.