Massachusetts Nurses Association is a state chapter of National Nurses United, which is "the largest union and professional association of registered nurses in U.S. history. At its founding convention in December, 2009, NNU adopted a call for action premised on the principles intended to counter the national assault by the healthcare industry on patient care conditions and standards for nurses, and to promote a unified vision of collective action for nurses with campaigns to: advance the interests of direct care nurses and patients across the U.S.; organize all direct care RNs 'into a single organization capable of exercising influence over the healthcare industry, governments, and employers'; promote effective collective bargaining representation to all NNU affiliates to promote the economic and professional interests of all direct care RNs; expand the voice of direct care RNs and patients in public policy, including the enactment of safe nurse to patient ratios and patient advocacy rights in Congress and every state; win 'healthcare justice, accessible, quality healthcare for all, as a human right.'"