Samuel P. Huntington was Albert J. Weatherhead III University Professor and director of the John M. Olin Institute for Strategic Studies at Harvard. His many books include The Third Wave: Democratization in the Late Twentieth Century (1991) and The Clash of Civilizations and the Remaking of World Order (1996).
When the “third wave” reached Latin America in the 1970s and 1980s, it brought major advances for democracy. By the first decade of the current century, however, advances had given…