Direct legislation has returned to excite considerable interest after a quiet period of a few years in which the traditional legislative processes were allowed to operate undisturbed in the states and cities. Old age pension plans put before the voters by initiative petitions in Colorado, California, and Ohio have excited more inspection of direct legislation procedures than at any time in their history. Several studies have been made of the laws governing the initiative and referendum, and also of their operation in the states. No less significant than state-wide initiatives and referenda have been the anti-picketing and labor regulating initiatives in Los Angeles; ordinances in San Francisco, Los Angeles, and Oakland, California, requiring two operators on street cars; attacks upon proportional representation in New York by petitions; attempts by labor organizations in Detroit to set policies regarding working conditions on the city's street railways by initiative ordinances; or the attempts by firemen and police in many cities to obtain civil service and pension systems through the same device. Several of these cities now have approximately thirty-five years of experience with municipal direct legislation.Numerous factors in American municipal politics have combined within the past fifty years to develop a sentiment for laying upon the electorate a portion of the responsibility for determining local policy. The idea that the voters of the municipality should be allowed, to decide certain policies was developed chiefly by the home rule movement.