In history there have been many speeches that influenced and changed the course of events. Words expressed during crucial historical events have marked forever the collective memory as they influenced, excited, inspired millions of people and they have also produced great expectations. But what are the most famous speeches of contemporary history? Aldo Cazzullo, editorial journalist of “Corriere della Sera”, answers to this question. Cazzullo will help us to discover what words changed the world during the last 100 years, analyzing them sociologically, culturally and linguistically.