Types are disorders. To protect is useful the mind, which should be whole - where all 8 functions are equal in strenght and valuing.
For this should more help to be opened for communications with other types (including in bad IR), and not an isolation.
Better IR allow functional improving as more pleasant and easier process. But it's useful to have types with other values in communications, anyway, even when they annoy. As it's a half (4/8) of important data about the world.

You best develop functions strenght in good IR, but best study to take into account weak nonvalued functions in worst IR.

So no armies and no borders. As minimum, it's where should go after you more balance the type and so easier accept info from worse IR people.
When you are in child mind state (weak functions are too weak) - you more need protections. But it should not be the main approach. It should be - you'll be psychicly growing and make your interactions wider and wider. In the end of this way you'll can make hugs with conflictors and superegos as your good friends.

Let's make reasonable peace and not armies for wars.