The period following World War II saw substantial growth of Virginia's suburban areas, notably in the regions of Northern Virginia, Richmond, and Hampton Roads. The population became more diverse. People of the emerging middle class were increasingly less willing to accept the rural focus of the General Assembly, nor Byrd's extreme positions on public debt and social issues. The latter was nowhere more graphically illustrated than with Byrd's violent opposition to racial integration of the state's public schools. His leadership in the failed policy of Massive Resistance to racial desegregation of the public schools and efforts to circumvent related rulings of the United States Supreme Court ultimately caused closure of some public schools in the state and alienated many middle class voters. The Byrd Organization had never been strong in Virginia's independent cities, and beginning in the 1960s, city and suburban factions increasingly supported efforts to make broad changes in Virginia. In this climate, the Republican Party of Virginia began making inroads.