The Romantic era in France (roughly 1820–1850) was a period of extraordinary literary productivity, political upheaval, and the democratization of reading. Three revolutions — 1789, 1830, and 1848 — restructured French society within living memory, and the literature reflected this: Hugo's historical dramas, Stendhal's psychological realism, Balzac's panoramic social fiction, and Dumas's serialized adventure epics were all, in different registers, attempts to make sense of a world that kept changing under the feet of the people writing about it. The press was the engine. The feuilleton — the serialized novel published in newspaper supplements — created a new mass readership and a new economic model for fiction, and Dumas exploited it more successfully than anyone else of his generation.
Dumas's colonial heritage — his grandmother enslaved, his father born free through his grandfather's recognition — placed him at an intersection of identities that French society preferred not to examine. The racism he encountered, including the notorious jibe by a rival journalist ("Monsieur Dumas, I hear you are partly black?" — to which he replied: "Yes, my father was a mulatto, his father was a Negro, and his father was a monkey. My ancestry begins where yours ends") became fuel. He outlasted every critic, outlived most of his rivals, and died having produced more work than any single person could plausibly have written — which was, of course, the point.
1802 — Alexandre Dumas born in Villers-Cotterêts; father General Dumas dies 1806
1829 — Henri III et sa cour premieres at the Comédie-Française; overnight celebrity
1844 — The Three Musketeers and The Count of Monte Cristo published in the same year
1851 — Bankrupted by Château de Monte-Cristo; flees to Brussels; writes his way back
1870 — Dies at his son's house in Puys; moved to the Panthéon in 2002