Let's not forget the realities of "today".
it would be "nice" if we could all be friends and share the worlds resources equitably.
It would be "nice" if we could concentrate the world's resources on making life pleasant, health, education, energy, food - no need for police or border control etc
It would be "nice" if..................
But "today" the world is far from being a "nice" place where everybody is "nice" to one another.
So, whilst we work hard to make this world a "nice" place, let's be realistic.
We need NATO and armed forces to help us persuade very "nasty" people to become "nice"
It's a bit of a dilema !