This curated playlist takes us back to a time of political upheaval and unprecedented carnage and destruction. The first world war brought new military technologies to use and introduced the world to the horrors of trench warfare. By the time the Allies claimed victory, more than 16 million soldiers and civilians had been killed. That was dwarfed the number who died in the flu epidemic that followed. In the aftermath, leaders patched things up, and whole new illusions and conflicts set in.