After several recent special issues, conceived and prepared successively by R. H. Robbins and E. M. Uhlenbeck (no. 153, ‘The Cultural Heritage: Languages in Peril”), Y. M. Coppens (no. 155, “From the Heavens to the Mind”), M. Matarasso (no. 158, “Shamans and Shamanism: On the Threshold of a New Millennium”), Diogenes turned to Julio Labastida, coordinator of the study of the social sciences at the National University of Mexico and contributing editor to Diogenes (he is in charge of the Spanish edition), and asked him to gather together for the current issue a certain number of articles devoted to themes related to the five-hundredth anniversary of America's “discovery” and its entry into a unified world.