Cardinal Richelieu is one of the best known and most studied statesmen in European history; his Spanish contemporary and rival, the Count-Duke of Olivares, one of the least known. The contrasting historical fortunes of the two men reflect the outcome of the great struggle in seventeenth-century Europe between France and Spain: the triumph of France assured the fame of Richelieu, while Spain's failure condemned Olivares to historical neglect. This...