Rockefeller Center of "festivity" around it, unlike most other office buildings in America. Sigfried Giedion wrote in his book "Space, Time and Architecture" that Rockefeller Center's design was akin to a "civic center" whose design represented the 1930s version of the future. Henry Luce, the founder of Time Inc., said in 1941 that Rockefeller Center represented "the true world of tomorrow", as opposed to the 1939 New York World's Fair, whose "World of Tomorrow" representations "are today junk piles under the winter snow". Novelist Gertrude Stein said in 1935, "The view of Rockefeller Center from Fifth Avenue is the most beautiful thing
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