Five Centuries of Food Production and Consumption in Central Mexico
Foerster Lectures on the Immortality of the Soul
Charles M. and Martha Hitchcock Lectures
Howison Lectures in Philosophy
Jefferson Memorial Lectures
Bernard Moses Memorial Lecture
Carl O. Sauer Memorial Lecture
Barbara Weinstock Lectures on the Morals of Trade
Professor Borah was an expert on the historical demography of Mexico as a colony of Spain. His work demonstrated his deep respect for Mexican and Hispanic culture and its colonial institutions. His research elaborated on the theory that the microbiological unification of the world is the main cause of the genocide in the aboriginal populations in Oceania and America.