Europe disarmed massively after WW2, understandable if you look at scale of the damage that was done. That left the US as the bouncer (street name: NATO) for the West, an arrangement that's probably by and large worked, some questionable misadventures on foreign shores notwithstanding. WW2 is no longer relevant and Europe should rearm and share the defense burden, even Germany. Ideally there'd be no defense burden at all, and a defense budget of $0, but if you neglect it then, even in enlightened 2022, you get raped and pillaged c.f. Ukraine.