High Quality Content by WIKIPEDIA articles! The Ventotene Manifesto is a political statement written by Altiero Spinelli and by Ernesto Rossi while they were prisoners on the Italian island of Ventotene during World War II. Completed in June 1941, the Manifesto was circulated within the Italian Resistance, and it soon became the programme of the Movimento Federalista Europeo. The Manifesto encouraged a federation of European states, which was meant to keep the countries of Europe close, thus preventing war.