Edited sentence: Anger of local government control by Protestants, and the awarding of housing to Protestants to ensure Unionist majorities in areas with large Catholic populations, played a significant part in creating the Civil Rights Movement in the 1960s, with a sit-in by nationalist politician Austin Currie in a house granted to an unmarried protestant woman ahead of a large homeless Catholic family triggering off the movement.Once established under the Government of Ireland Act 1920, Northern Ireland was structured geographically (see gerrymander) so as to provide unionist majorities in its local government system, with significantly nationalist areas producing unionist majorities through the granting of voting rights exclusively to property owners (where most Catholics were renting and most Protestants were owners)