Which idea would washington gladden have been most likely to support?

Washington Gladden, an American religious and progressive leader pioneer on unionization, oppositor of systems such as racial segregation and unregulated capitalism, who deeply cared about the well being of workers in the U.S. around the 1860s and 1870s, thereby an idea he'd most likely support was minimum wage laws.

Explanation:

most people were factory or company owners.