Ca Ira: an operatic history of the French Revolution by Pink Floyd's Roger Waters. Before the rise and fall of the guillotine, before the terror took hold, the People of France fought for a a better world based on the ideals of liberty, equality and fraternity. It is this story of hope and promise that inspired Ca Ira." Set during the optimistic early days of the French Revolution "Ca Ira" is a work of stunning power and beauty invoking the passion madness and triumph of faith in a time that forever changed the nature of the world.