Final answer:
The specific individual who started an advertising agency in 1931 during the Depression is not named in the provided information. Further historical research is necessary to identify the person in question. The provided references do cover the broader context of the Great Depression and New Deal era, including the roles of President Hoover and President Roosevelt in addressing the economic crisis.
Step-by-step explanation:
The individual who started his own agency in 1931, two years into the Depression, and had an enormous impact on the look of depression-era advertising is not explicitly mentioned in the provided references. The information available discusses the broader impact of the Great Depression on society, the New Deal programs, and key figures such as President Hoover and President Roosevelt, but does not name a specific individual who started an advertising agency during this period. To provide an accurate answer, further research into historical sources would be required.
However, the Great Depression, lasting from 1929 to 1941, led to widespread economic hardship with a significant impact on the American workforce and business landscape. During the New Deal era, President Franklin Delano Roosevelt enacted various programs, such as the Works Progress Administration (WPA), to help revitalize the economy and provide support to unemployed citizens, including artists and photographers who documented the social conditions of the time.
Without a specific name given for the advertising agency founder, one can only refer to the larger context in which advertising would have adapted to the prevailing social and economic conditions of the Great Depression era. Studying the strategies and designs that became popular during this time might provide insights into how advertising evolved in response to widespread financial duress and changing public sentiments.