Can the fire & forget Javelin missile repel the aggressor, force a massive re-think of military doctrine…and literally save lives?

Can the fire & forget Javelin missile repel the aggressor, force a massive re-think of military doctrine…and literally save lives?
Will this historical hinge-point, lift us above our trivial daily concerns, and provide a moment of clarity about what’s really important?
As the U.S. president sends our troops to Eastern Europe, how will they deal with this crucial fact?