Despite its importance, the 20th-century Latin American right has received little scholarly attention. This work compares extreme rightist organizations, ideas, and actions in different national settings in Latin America. The right in Argentina, Brazil, and Chile has changed over time and has contained moderate and extreme factions, the book's title, "Las Derechas", emphasizes this diversity. The author focuses on extreme right-wing movements, showing how their class and gender composition, motives, programs, and activities varied over time and between countries.