Earlier quoted context omitted.
Early in my career (it began after a discussion in a tutorial during my undergrad) I made a choice to never to use my engineering skills to build weapons. I don't believe its a morally justifiable choice in this century. It's not like I have been forced to starve as a result but it did reduce a few opportunities.
> I don't believe its a morally justifiable choice in this century. Could we say that nuclear(and other) weapons are responsible for the bringing unprecedented world peace to the world?
The US, meanwhile, has been engaged in wars almost non-stop since WW2. It's "unprecedented world peace" for for only a select few nations.
And, most importantly, the costs of failure have gone up dramatically with the invention of nuclear weapons. The Cuban Missile Crises is just one of several near-catastrophic events. Sooner or later, we will get a madman in a position of power, fall victim to a misunderstanding, or suffer a technical failure.
And that'll be that...