In July 1793, a Jacobin called Maximilien de Robespierre and eight other leading Jacobins set up the Committee of Public Safety. It was the most powerful group in France. This group and Robespierre were responsible for the Reign of Terror. Robespierre believed that if people were afraid, the revolution would go better. The Reign of Terror lasted from the spring of 1793 to the spring of 1794.