Jean-Paul Marat was a fiery republican journalist who was an important figure in the French revolutionary movement. A scientist (he translated Newton’s “Opticks” into French, among other accomplishments), after the revolution, he devoted himself to politics and propaganda. He was heavily involved in the factional struggles surrounding the revolution.
It was this latter that led to his death. Charlotte Corday was a member of a rival political faction, the Girondists, who believed that Marat was largely responsible for the fall of the Girondists – and that the outcome of that factional struggle might well lead to outright civil war in France. And so it was that Corday surprised Marat in his bathtub one night, stabbing him once in the carotid artery, which killed him in very short order. Later that year, he was immortalised in a painting, “The Death of Marat” by Jacques-Louis David, which has become an iconic image of revolutionary martyrdom.