It’s not nation building the author is suggesting, it’s an alternative to UN, which ia a walking corpse already. We need allies, but such that treat us with respect and reciprocte to our kindness.
We do not need the UN or an alternative for it. That is like looking for an alternative to cancer. What disease would you replace it with? Nations do not need power hungry globalist institutions to have friendly relations with one another. They do need their national sovereignty as a roadblock to global tyranny.