Final answer:
In the 1930s, folk singers became supporters of Communism, attracted by its promise of economic equality as an alternative to the capitalist systems experiencing crisis during the Great Depression.
Step-by-step explanation:
In the 1930s, folk singers became involved in many social causes and some of them supported a particular political system, which was Communism. Communism appealed to some folk singers as it offered an alternative to the capitalist systems that were undermined by the Great Depression and promised economic equality. Although communism eventually lost its appeal in the 20th century, it was a significant political ideology during the 1930s.