O’Brien’s “groups” are not Jonathan Edwards’s congregation or assembly. Nor are they the nineteenth-century bourgeoisie “crowds” of Gustave Le Bon, who argued there was no culture in social movements (only unconscious religious structures), though we do get “crowds” akin to the “clouds” of Charles Baudelaire, Constantin Guy, and Walter Benjamin. Nor are they Marxist “masses” or “unions,” or the twentieth-century “association” or “league” (Women’s, of Nations).