Nelson Rockefeller that the inclusion was essential, especially to U.S. policy in Latin America, successfully urged the need for regional pacts within the framework of the UN. Rockefeller was also instrumental in persuading the UN to establish its headquarters in New York City. President Truman fired Rockefeller, reversed his policies, and shut down the OCIAA. Reich says that in official Washington, Rockefeller had become "a discredited figure, a pariah." He returned to New York. Back in the metropolis in mid-1945, Rockefeller served as Chairman of Rockefeller Center, Inc., (1945–53 and 1956–58) and began a program of physical expansion. He established the American
Rockefeller Center assistant, Lucienne Bloch.) Rivera's fresco in the Center was replaced with a larger mural by the Catalan artist Josep Maria Sert, titled "American Progress", depicting a vast allegorical scene of men constructing modern America. Containing figures of Abraham Lincoln, Mahatma Gandhi, and Ralph Waldo Emerson, it wraps around the west wall of 30 Rockefeller Plaza's Grand Lobby. In its earliest years, Rockefeller Center received largely negative and pessimistic reviews from architectural critics. The most cynical opinion came from renowned architectural scholar Lewis Mumford, who so hated the "weakly conceived, reckless, romantic chaos" of the March 1931 plans for Rockefeller Center