Why Economic Nationalism is a philosophy of war

Here's some Ludwig Von Mises, explaining why Economic Nationalism is a philosophy of war. 

I've long believed that Economic Nationalism (quotas, tariffs, price supports), like most other forms of tribalism, was outright racist but I couldn't quite articulate it. 

You've gotta love this quote:

 Imagine a world in which the principle of private ownership of the means of production is fully realized, in which there are no institutions hindering the mobility of capital, labor, and commodities, in which the laws, the courts, and the administrative officers do not discriminate against any individual or group of individuals, whether native or alien. Imagine a state of affairs in which governments are devoted exclusively to the task of protecting the individual's life, health, and property against violent and fraudulent aggression. In such a world the frontiers are drawn on the maps, but they do not hinder anybody from the pursuit of what he thinks will make him more prosperous. No individual is interested in the expansion of the size of his nation's territory, as he cannot derive any gain from such an aggrandizement. Conquest does not pay and war becomes obsolete.

Go here to read the whole thing.  It's hard to declare war when your soldiers (and their money) and the citizens in "enemy" territory (and their money) are free to move elsewhere.