Final answer:
The Bolsheviks renamed their party the Communist Party to signify their commitment to establishing a classless society, aligning with Marxist ideology. During the Great Depression, the Communist Party's promise of an egalitarian society attracted many, including those marginalized in capitalist societies.
Step-by-step explanation:
The Bolsheviks renamed their party the Communist Party to reflect their commitment to a classless society. This renaming was emblematic of their ideological alignment with Marxism and the vision of society they wanted to achieve - one without class distinctions where the proletariat would rule. The Soviet Union, under the leadership of Lenin, used propaganda to promote these ideas and aimed to transform not just the political and economic structures, but also the consciousness and thoughts of the people. The Communist Party saw significant growth during the 1930s, especially as it offered an alternative to capitalist systems that seemed to be failing during the Great Depression. The ideology promised a more egalitarian society in which all people, regardless of race or gender, were treated equally, which attracted many, including African Americans facing segregation and discrimination in the United States.