The Arc Western Montana provides people with developmental disabilities and their families with the skills, tools, and supports that foster self-determination and inclusion, so they thrive as integrated members in their communities. Our Vision We envision a world in which people with intellectual and developmental disabilities are leading lives of influence, purpose, and mutually beneficial relationships within the communities where they live, learn, work, and socialize. Our Mission The Arc Western Montana provides people with developmental disabilities and their families with the skills, tools, and supports that foster self-determination and inclusion, so they thrive as integrated members in their communities.