Walker Evans took up photography in 1928, capturing the architecture and people of New York. He loved the medium, although he was initially not able to make much money from his talents. In 1935, Roy Stryker hired him to work with the FSA. He had previously done some work for the Department of Interior and had certain ideas about how to document America. He believed in pure documentation, not propaganda. Evans became very well known for the work he did at Fortune magazine and remained there as a staff photographer for 20 years. During his time at the magazine he produced the photographs for Let Us Now Praise Famous Men, which was written by James Agee. The book arose out of an assignment about the conditions of sharecroppers during the dust bowl and was published in 1941. In 1954, he left to become a professor of photography at Yale University where he remained until his death.