The National Labor Relations Act (NLRA) establishes most private-sector workers' rights to unionise and collectively bargain over wages, benefits, and working conditions. Enacted in 1935, the NLRA also permits collective bargaining contracts between employers and labour organisations that require every individual covered by the collective bargaining contract to pay dues to the negotiating labour organisation. These contract provisions are known as union security agreements. Since the NLRA was amended by the Taft-Hartley Act in 1947, individual states have been permitted to supersede the union security provisions of the NLRA by enacting laws that prohibit union security agreements. These state laws are known as right to work (RTW) laws. This book provides a brief legislative history on RTW laws and on the federal role in the regulation of unions; a summary of the origin and developments of RTW laws, recent events at the state level, and federal labour relations statutes.