What Wallersein proposed in its place was a unified system approach that did not limit itself to Anybody subject matter or approach for examining world-wide concerns but put together the spheres of society, economy, and politics. Prebisch was the first to use the terms Main and periphery to describe this https://socialmediainfluencers00009.blogtov.com/8532352/social-media-influencers-can-be-fun-for-anyone