Sibling love may be one of the purest and longest-lasting bonds we know—but where there is love, there can also be rivalry. From childhood one-upmanship and bruised egos to battles over money, power and success, sibling relationships can take surprisingly complicated turns.AdvertisementHistory and popular culture are filled with brothers and sisters whose bonds have been tested by competition, ambition and circumstance. We look at some of the most fascinating sibling rivalries—stories that show how the same bond can inspire, divide or even define lives, depending on how the siblings channelise the angst.Advertisement AdvertisementIn the royal spotlightOnce the inseparable ‘royal brothers’ Prince...