ItwastheageofDaVinciandMichelangelo,ofenlightenedcreativityandunparalleledintellectualachievement.ButitwasalsotheageofMachievelli,oframpantlawlessness,incessantwarandunspeakabledepravity.AttheheartoftheworldorderwastheVatican,thearbiterofconflictsbetweenkingdo...