Unions can experiment with a form of membership or affiliation founded on ideological alignment rather than provision of services—an organization of people who want to learn about and support unions but are not currently represented by a union—similar to the American Civil Liberties Union, Sierra Club or National Rifle Association. These diffuse supporters could be a source of leaders and support for efforts by working people to come together in a union or to bargain a fair contract, as well as for pro-worker policy initiatives.