"Colonial Africa fell within that part of the international capitalist economy from which surplus was drawn to feed the metropolitan sector. As seen earlier, exploitation of land and labor is essential for human social advance, but only on the assumption that the product is made available within the area where the exploitation takes place. Colonialism was not merely a system of exploitation, but one whose essential purpose was to repatriate the profits to the so-called mother country. From an African viewpoint, that amounted to consistent expatriation of surplus produced by African labor out of African resources. It meant the development of Europe as part of the same dialectical process in which Africa was underdeveloped."