This popular anthology of twentieth-century art theoretical texts has now been expanded to take account of new research, and to include significant contributions to art theory from the 1990s. * New edition of this popular anthology of twentieth-century art-theoretical texts. * Now updated to include the results of new research, together with significant contributions from the 1990s. * Includes writings by critics, philosophers, politicians and literary figures. * The editors provide contextual introductions to 340 texts. * Complements Art in Theory 1648-1815 and Art in Theory 1815-1900 to create a complete survey of the theories underpinning the development of art in the modern period.