From the early to mid-20th century, the state was dominated by the Byrd Organization, with dominance by rural counties aligned in a Democratic party machine. Their hold was broken over their failed Massive Resistance to school integration. After World War II, the state's economy thrived, with a new industrial and urban base. A statewide community college system developed during the 1960s. The first U.S. African-American governor since Reconstruction, was Virginia's Douglas Wilder in 1990. Since the late 20th century, the contemporary economy has become more diversified in high-tech industries and defense-related businesses. Virginia's changing demography makes for closely divided voting in national elections, but it is still generally conservative in state politics.