butler began brain multiples in 1991 to finance, edit, publish and distribute artists’ editions. rather than representing artists, butler collaborated with them on projects in which he found interest. artists who have produced brain multiples with butler include john baldessari, rachel khedoori, paul mccarthy, jorge pardo, philippe parreno, jason rhoades, katy schimert, diana thater and rirkrit tiravanija, among others.