`The conquerors wanted Indian labour, the crown Indian subjects, the friars Indian souls.' Thus the importance of the natives of Mexico to their Spanish conquerors has been described. In this book Andre Gunder Frank examines the dramatic impact of Spanish rule on Mexican society and agriculture, in terms of the demands of world capitalist development. Mr Frank traces the rapid transformation of the dominant institutions of Mexican labour organization which occurred after the Spanish conquest of the Aztec empire in 1521: from a form of slavery, which lasted until 1533, through various forms of forced labour (the encomienda and the catequil or mica), to the establishment, after 1575, of the hacienda, with large-scale latifundia lands worked by serf-like ganan labour.