Volpi, however, who was allied at different
times with different vociferous factions, and revered by the many «volpistas» in Brazil who
championed his work, remained dedicated to his own
evolution: `... I never think about what I am doing, I think only about the problem of the line, of the shape of colour,» he once said.
Marcel Duchamp, the
champion of Dada in the United States, who tried to narrow the distance between art and life by celebrating the mass - produced objects of his
time, was the most influential figure in the
evolution of Pop art.