> War destroys progress and is incredibly inefficient.
Please explain the monumental advancements of technology witnessed during both world wars. Even if they were not a direct result of the war effort, they still succeeded in spite of all technically and scientifically advanced nations being on a war footing during those time periods.
> The mere threat of war creates an endless arms race resulting in half of discretionary spending going to defense.
Please explain why we have not seen a significant drop in defense spending during the periods when the threat of war has lessened. Especially after the fall of the Soviet Union when the world was decidedly unipolar for more than a decade.
> The reason for submitting to government authority is for protection of life and liberty.
I would argue that ceding some liberty to government is necessary for peaceful defense of life and property (backed up by the threat of collective force) but I don't believe that a government inherently defends liberty. To the contrary I think that liberty must be actively defended from the excesses of government, preferably by building those protections in to the legal foundation of the governments power so that if they are violated it invalidates the mandate granted and provides legal recourse against the government in favour of those wronged by it.
To be clear, I don't support war and I think that there are much better and less destructive ways to stimulate technological and societal growth but I don't hold with weak arguments either.