In 1863, Édouard Manet unveiled 'Le Déjeuner sur l'herbe' and the Paris art establishment didn't just reject it — they launched a coordinated campaign to humiliate him personally, professionally, and financially. But here's the part the Musée d'Orsay gift shop won't tell you: Manet spent the rest of his life desperately trying to win back the approval of the very people he'd accidentally declared war on.