The Commonwealth of Virginia (i /vərˈdʒɪnjə/) is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" because it is the birthplace of eight U.S. presidents. The geography and climate of the state 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 the most populous political subdivision. The state population is nearly eight million.[5] 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. Land from displaced Native American tribes and slave labor each played significant roles in the colony's early politics and plantation economy. Virginia was one of the Thirteen Colonies in the American Revolution and joined the Confederacy in the American Civil War, during which Richmond was the Confederate capital and the state of West Virginia separated. Although traditionally conservative and historically part of the South, both major national parties are competitive in modern Virginia.[6] The Virginia General Assembly is the oldest legislature in the Americas. The state government has been repeatedly ranked most effective by the Pew Center on the States.[7] 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 places like the Shenandoah Valley; federal agencies in Northern Virginia, including the Department of Defense and CIA; and military facilities in Hampton Roads, the site of the region's main seaport. The growth of the media and technology sectors have made computer chips the state's leading export, with the industry based on the strength of Virginia's public schools and universities.[8] Virginia does not have a major professional sports franchise, but is home to several prominent collegiate sports programs.