Inside a 19th century slave house on the edge of Thomas Jefferson's Monticello plantation, young African leaders are finding historical models to follow – and some not to. "They're here in what might be called the Silicon Valley of democracy, Jefferson's Monticello, Monroe's Highlands and Madison's Montpelier, so [we're] talking a little bit about how civil society has developed here," said University of Virginia Vice Provost for Global Jeffrey Legro. "It's an inspiring place for both what worked, and what didn't work." Twenty-five fell...