Complex sentence: By the 1930s, Davis was already a famous American painter, but that did not save him from feeling the negative effects of the Great Depression, which led to Stuart Davis being one of the first artists to apply for the Federal Art Project.
Split into simpler sentences: By the 1930s, Davis was already a famous American painter, but that did not save him from feeling the negative affects of the Great Depression. No one was exempt from the effects of the Great Depression and led to Stuart Davis being one of the first artists to apply for the Federal Art Project.