First edition. Pareto observes that all social movements which have had any impact on history have been upheld by a faith, so their success has been guaranteed by the intensity of myth as opposed to logical reasoning. Le Mythe is important not only because it summarizes Pareto’s earlier works, but because it prepared the position which Pareto would occupy in his Trattato di sociologica generale (1916), being originally conceived as part of this later work.