MEXICO CITY.- Historians, anthropologists, sociologists and political scientists from different Mexican academic institutions gathered at the seminar “Fin de siglos: ¿fin de ciclos?” (“End of Centuries: End of Cycles?”), coinciding that by the end of the last centuries (18th, 19th and 20th) several historical aspects have repeated in a cyclic way; these aspects were analyzed with the objective of defining the present historical moment, to determine if we are “entering another end of cycle”. Specialists compared facts considered characteristic of the end of 18th and 19th centuries, which apparently repeat every 100 years as historical cycles, and observed how these facts, expressed in revolutions, opened the following centuries. According to Leticia Reina from the National Institute of Anthropology and History Direction of Historical Studies, coordinator of the academic encounter, one of the most characteristic coincidences is modernity, in which a spectacular economic