Maximilien Robespierre
was the most radical social philosopher of the French Revolutionary period
Many historians regard the
French Revolution
as the bloody beginning of the modern world.
This link
provides a resource for those with little knowledge of the French Revolution and is an opportunity for those who have not studied it since their schooldays to review this landmark event in the history of man's relation to his fellow men.
The French Revolution at the Internet
Modern History Sourcebook is a more academic and philosophical account of this event.
The French Revolution Home page is yet another good resource.