War and annihilation is not a sustainable endeavour. Without an enemy and without constant war the Third Reich would likely have fallen apart pretty quickly. It

War and annihilation is not a sustainable endeavour. Without an enemy and without constant war the Third Reich would likely have fallen apart pretty quickly. It wasn't exactly a utopia and their economy mostly was a large Ponzi scheme predicated on constant war. Even arguably less aggressive and more successful (in terms of longevity) entities such as the British or the Spanish Empire weren't particularly long-lived on a large timescale.