[[{"fid":"16829","view_mode":"inlineright","fields":{"format":"inlineright","field_file_image_alt_text[und][0][value]":false,"field_file_image_title_text[und][0][value]":false},"link_text":null,"type":"media","field_deltas":{"1":{"format":"inlineright","field_file_image_alt_text[und][0][value]":false,"field_file_image_title_text[und][0][value]":false}},"attributes":{"class":"media-element file-inlineright","data-delta":"1"}}]]His magisterial Seven Interpretative Essays on Peruvian Reality, published in 1928, are still essential reading for an understanding of the indigenous peoples' socio-economic realities following the  Spanish conquest.

It had obliterated the Inca power elites and state structures but left their communal networks, their culture and organisation practically intact.