The World in Revolt is a 1921 study by Gustave Le Bon (1841-1931), the French social psychologist whose The Crowd remains the classic anatomy of mass behaviour. Surveying the upheavals that followed the First World War, the strikes, revolutions, and the Bolshevik experiment, Le Bon applies his crowd psychology to a Europe he saw sliding from war into permanent unrest. His diagnosis is conservative and often acid, but his influence ran wide; readers from Theodore Roosevelt to the dictators studied his books. Free PDF download available on BDeBooks.