Theodor Seuss Geisel

Theodore Geisel—best known today as “Dr. Seuss”—worked as a cartoonist and illustrator during the 1920s and 1930s. His work appeared in "LIFE," "Vanity Fair," "The Saturday Evening Post," and other magazines. Geisel also created advertisements for corporate clients, including Standard Oil and General Electric. In 1937, he published his first children’s book. During the early years of World War II, Geisel was a cartoonist for "PM," a liberal New York newspaper. He later designed posters for the Treasury Department and the War Production Board. In 1943, Geisel joined the army where he made animated training films.