the mentality that arises when considering movement. Gleizes asserted repeatedly in his publications that human creation implies the total renunciation of external sensation. That to him is what made art mobile when to many, including Rodin, it was rigidly and unflinchingly immobile. Gleizes first stressed the necessity for rhythm in art. To him, rhythm meant the visually pleasant coinciding of figures in a two-dimensional or three-dimensional space. Figures should be spaced mathematically, or systematically so that they appeared to interact with one another. Figures should also not have features that are too definite. They need to have shapes and compositions that are almost unclear, and from there the viewer can believe that the figures themselves are moving in that confined space. He wanted paintings, sculptures, and even the flat works of mid-19th-century artists to show how figures could impart on the viewer that there was great movement contained in a certain space. As a philosopher, Gleizes also studied the concept of artistic movement and how that appealed to the viewer. Gleizes updated his studies and publications through the 1930s, just as kinetic art was becoming popular. Jackson Pollock When Jackson Pollock created many of his famous works, the United States was already at the forefront of the kinetic and popular art movements. The novel styles and methods he used to create his most famous pieces earned him the spot in the 1950s as the unchallenged leader of kinetic painters, his work was associated with Action painting coined by art critic Harold Rosenberg in the 1950s. Pollock had an unfettered desire to animate every aspect of his paintings. Pollock repeatedly said to himself, "I am in every painting". He used tools that most painters would never use, such as sticks, trowels, and knives. He thought of the shapes he created as being "beautiful, erratic objects". This style evolved into his drip technique. Pollock repeatedly took buckets of paint and paintbrushes and flicked them around until the canvas was covered with squiggly lines and jagged strokes. In the next phase of his work, Pollock tested his style with uncommon materials. He painted his first work with aluminum paint in 1947, titled Cathedral and from there he tried his first "splashes" to destroy the unity of the material itself. He believed wholeheartedly that he was liberating the materials and structure of art from their forced confinements, and that is how he arrived at