Virginia officially the Commonwealth of Virginia, is a U.S. state located in the South Atlantic region of the United States. Virginia is nicknamed the “Old Dominion” due to its status as a former dominion of the English Crown, and “Mother of Presidents” due to the many U.S. presidents having been born there. The geography and climate of the Commonwealth are shaped by the Blue Ridge Mountains and the Chesapeake Bay, which provide habitat for much of its flora and fauna. The capital of the Commonwealth is Richmond; Virginia Beach is the most populous city, and Fairfax County is the most populous political subdivision. The Commonwealth’s estimated population is over 8.3 million. The area’s history begins with several indigenous groups, including the Powhatan. In 1607 the London Company established the Colony of Virginia as the first permanent New World English colony. Slave labor and the land acquired from displaced Native American tribes each played a significant role in the colony’s early politics and plantation economy. Virginia was one of the 13 Colonies in the American Revolution and joined the Confederacy in the American Civil War, during which Richmond was made the Confederate capital and Virginia’s northwestern counties seceded to form the state of West Virginia. Although the Commonwealth was under single-party rule for nearly a century following Reconstruction, both major national parties are competitive in modern Virginia. The Virginia General Assembly is the oldest continuous law-making body in the New World. The state government has been repeatedly ranked most effective by the Pew Center on the States. It is unique in how it treats cities and counties equally, manages local roads, and prohibits its governors from serving consecutive terms. Virginia’s economy has many sectors: agriculture in the Shenandoah Valley; federal agencies in Northern Virginia, including the headquarters of the Department of Defense and CIA; and military facilities in Hampton Roads, the site of the region’s main seaport. Virginia’s economy changed from primarily agricultural to industrial during the 1960s and 1970s, and in 2002 computer chips became the state’s leading export.