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Douglas Harper's Etymology Dictionary
proletarianism

1844, from proletarian + -ism.

Wiktionary
proletarianism

n. 1 (context uncountable English) The political character and practice of the proletariat; advocacy or advancement of the proletariat’s interests. 2 (context uncountable English) The state, quality, or condition of being a proletarian. 3 (context countable English) A proletarian word or turn of phrase; a vulgarism. 4 (context uncountable rare English) proletarian regarded as a class; the proletariat.

Usage examples of "proletarianism".

If politicians of all sorts searched diligently amongst their antecedents for proletarianism and denied aristocratic contacts three times before cockcrow every weekday morning, who was I to spoil the fun?