Peter Jackson's World War I documentary They Shall Not Grow Old is not an easy movie to watch, but it is a necessary one. Technologically impressive, historically important, and equal parts inspiring and damning when it comes to the human condition, the stunning filmmaking achievement documents the lives of soldiers fighting in World War I and brings their stories to life using archival historical footage restored to near high-definition standards, complete with hand-colorized updates. The WingNut Films production, complemented with archival material provided by the BBC and London’s Imperial War Museum, already set a record as …