Provence, 1970 is about a singular historic moment. In the winter of that year, more or less coincidentally, the iconic culinary figures James Beard, M.F.K. Fisher, Julia Child, Richard Olney, Simone Beck, and Judith Jones found themselves together in the South of France. They cooked and ate, talked and argued, about the future of food in America, the meaning of taste, and the limits of snobbery. Without quite realizing it, they were shaping today's...