"There is an excellent study of the phenomenon of hunger on a world scale by a Brazilian scientist, Josue de Castro. It incorporates considerable data on the food and health conditions among Africans in their independent pre-colonial state or in societies untouched by capitalist pressures; and it then makes comparisons with colonial conditions. The study convincingly indicates that African diet was previously more varied, being based on a more diversified agriculture than was possible under colonialism. In terms of specific nutritional deficiencies, those Africans who suffered most under colonialism were those who were brought most fully into the colonial economy: namely, the urban workers."