" A survivor, in another sense, was left alive. The king’s nephew, Stephen, count of Blois, was suffering from a severe bout of diarrhoea and declined to join the revelry aboard the White Ship. Since he would be crowned as king of England fifteen years later, it can plausibly be maintained that an attack of diarrhoea determined the fate of the nation. Statesmen may plot and plan. Learned men may calculate and conclude. Diplomats may debate and prevaricate. But chance rules the immediate affairs of humankind. "

― Peter Ackroyd , Foundation: The History of England from Its Earliest Beginnings to the Tudors (The History of England, #1)