Humankind just can't resist a celebration-whoever we are and wherever on Earth we may be, somebody's got a reason to cheer: a new spouse, a new house, a new year, or a new baby. Sometimes the occasion is grand-a royal wedding, a coronation, a presidential inauguration-and sometimes it's as simple as a home-cooked family feast, but every society and every civilization marks life's milestones with events and traditions uniquely their own. This lavish...