Any thoughs, ways I could improve this paragraph and how to end it?

Next, during each revolution, a series of radical events took place to ensure the safety of the new governments, the revolutionary government in French and the communist-dictatorship in Russia. Maximillien Robespierre, along with Joseph Stalin carried out the most radical stages of the French and Russian Revoluitons, the Reign of Terror and the Great Purges. They were both obsessed with ridding themselves of the “corrupt” and potential enemies. These horrifying acts ended taking millions of lives, including ones of those innocent. ___________________.