Joy Division and New Order are two of the greatest and most important post-punk bands of all time, and at the center of those groups are two men: Bernard Sumner and Peter Hook. For years, they had a fruitful partnership: Sumner was the quiet and introspective one, and Hook was the gregarious rocker. But as the '80s unfolded, and New Order became one of the era's top indie pop groups, their relationship started to break down from clashes over the artistic direction of the band and their incompatible personalities. After 30 years, they finally split up, and the resulting acrimony remains heated to this day.