Final answer:
Voluntarism in American politics 1876 to 1900 primarily involved the participation of middle-class women in various reform movements, such as advocating for the prohibition of alcohol and the right to vote.
Step-by-step explanation:
Voluntarism in American politics 1876 to 1900 primarily involved the participation of middle-class women in various reform movements. These women volunteered in activities such as creating parks and recreation programs for children, improving public health, and advocating for the prohibition of alcohol. Although their main objective was not votes for women, they realized that voting was a way to achieve the changes they desired. Women mobilized across the country to advocate for the right to vote.