It feels like a lot of attempted global social policy of the past 50 or so years has been trying to create a stronger consciousness of "humanity" as a thing, with our new enemies being abstract issues like poverty, hunger, climate change, drugs, inequality, etc. The "War on [...]" branding is part of that. Doesn't seem like it really gets the blood going as much. We'll probably have to have conquering aliens to fight against before that happens.