For his part, Trumbo felt that “the freedom of the artist to express himself decreases in proportion to the increase of capital investment required for the production of the work.” Thus, the “freest form is the pamphlet,” and it is “not, therefore, difficult to understand why the theater deals less frequently with progressive subject matter than the novel”—and why the movies deal with it least of all. “Hollywood workers speak always of the industry, never of the medium. For motion picture workers are purely industrial workers,” which is why they had such a propensity for organizing and striking.132