I guess wars will be illegal when we no longer make steel and hence no longer capable of making ships and tanks. Maybe our enemies will sell us steel so we can fight fair.
Until and against that day, some industries deserve protection. When the last steelmaker goes away, we will need to buy our steel from our future adversaries. When the last chipmaker goes away (and that day is coming almost any moment) all of our weapons systems and military IT systems will have Chinese chipsets at their cores.
It is time for us to stop sacrificing our future on the altar of Free Trade.