Through higher educational opportunity, higher incomes, and more leisure, Labor has helped to provide the means for higher social standards. It has steadily set its face against rigid class barriers, insisting that Labor has a right to equality with all other groups. The labor movement has, therefore, advocated the extension of the ballot to all citizens regardless of sex or ownership of real estate. It has done much to widen the concept of equal protection before the law adapting methods to varying conditions. We have tried to write into statutes the recognition of workers' rights and the protection of their interests. We have persistently urged the establishment of bureaus of labor statistics so that there might be available information showing trends and measuring-rods of progress. We have sought to assure wage-earners the legal protection of their rights. Every state, for example, now has a mechanic's lien law. Forty states and the District of Columbia have established employers' liability for accidents to workers; forty-five provide compensation for industrial accidents. To assure greater equality of opportunity, all states have compulsory school attendance laws and all states have some form of law regulating child labor. Forty-four states, two territories, and the District of Columbia have mothers' pension laws. (page 168)