Four centuries ago, and fourteen years before the Mayflower, a group of men—led by a one-armed ex-pirate, an epileptic aristocrat, a reprobate cleric and a government spy—left London aboard a fleet of three ships to start a new life in America. They arrived in Virginia in the spring of 1607 and set about trying to create a settlement on a tiny island in the James River. Despite their shortcomings, and against the odds, they built Jamestown, a ramshackle outpost that laid the foundations of the B...