Siqueiros, one of the most important innovators of twentieth-century painting techniques, was also one of the most versatile and controversial figures in Mexican art. Stalinism was adopted with the same passion with which they love their wives or with which they took up the gun during the Mexican Revolution and the Spanish Civil War. He was a man of excesses and outbursts, a born actor who was strongly individual, a personality full of contrasts, an indomitable force of expression, who lived, painted, and struggled with passion, a passion the color of anger.