This document defines and discusses voluntary associations. Voluntary associations are groups that individuals join voluntarily to pursue a common purpose or goal. They are typically nonprofit organizations based around a shared interest, cause, or mission. Key characteristics include voluntary participation, a common purpose, nonprofit structure, and a defined organizational system. Examples provided include charitable groups, professional associations, community organizations, environmental nonprofits, and social or hobby clubs. The document emphasizes that voluntary associations are important for civil society as they enable collective action, community engagement, and social change.