French literary movement based on the psychological concept of group consciousness and collective emotion and the need for the poet to merge with this transcendent consciousness. Founded by Jules Romains (Romains, Jules) about 1908, Unanimism particularly influenced some members of the Abbaye group, a loose organization of young artists and writers interested in printing and publicizing new works. Petit traité de versification (1923; “Small Treatise on Versification”), by Romains and Georges Chennevière, and Notes sur la technique poétique (1910; “Notes on Poetic Technique”), by Georges Duhamel and Charles Vildrac, outlined the Unanimist theories of prosody, which resembled those of the American poet Walt Whitman in encouraging the use of strongly accented rhythms and the replacement of symbols and allegory by simple and unadorned diction.