For many years, there were efforts to organize teaching assistants on college campuses and form a union. often these efforts failed because of practical reasons: there were never enough volunteers, leaders were always graduating and leaving, and there was never any money for supplies.

what theory would be interested in these reasons?

The answer is social movement theory.

Explanation:

The social movement theory is generally used to explain why a number of people who work together to create or stop a social change, either succeed or fail with the human resources available to them as a collective group. Social movement theory helps to provide reasons why social mobilization and relationships occur in the first place, and why their results manifest. In addition, social movement theory could give insight about possible social, economic, cultural, and political consequences that could arise from social mobilization.

answer; decreased;