Nukes could be extremely useful in powering spacecraft, Pluto would be less than a year round trip. If the arsenals are to be reduced the nukes should be used for a Project Orion. Even without that, Nukes are useful in that they could potentially deflect asteroids.

Aggression and Competitiveness certainly have their place in a Capitalist society. The important thing is to direct such behavioral tendencies into business instead of into war or politics.