A quote that I found interesting:
“Nuclear weaponry cuts a convergent path into purity of conception. No hydrogen bomb has yet been used against an enemy (or “in anger” as the singularly inappropriate expression goes). Thermonuclear warheads remain among a select category of virtual weapons, alongside a variety of chemical and biological agents, whose usage has been exclusively diplomatic, or even philosophical. The value of this military machinery is strictly counter-factual. Those ‘possible worlds’ in which they have been operationalized support little, if any, value of any kind. Weaponry supporting their potentiality floats the ontological option of extreme negative utility. They are – in the most rigorous sense – nightmare generators.”
Another one, and quite evocative. Whatever warfare might turn towards in the 21st century, it will no doubt disgust even our most bloodthirsty ancestors:
“Much criticism of the Cold War nuclear arms race already configured it as an existential risk, before the term had been coined. Between an X-risk and an extreme deterrent there no definite boundary. The difference is technical. Deterrence is a mode of employment. It uses negative utility. In this respect anything bad could be useful, were it not that a deterrent requires a trigger, under the control of the negotiating agent (at the point of negotiation). To threaten a potential aggressor with an asteroid strike makes no sense, unless an asteroid strike can be delivered. The same holds for geological disasters in general. All of which means that the acquisition of engineering capabilities on the largest scales, such as geo-engineering, weather control, climate regulation, and asteroid defenses – perhaps developed explicitly to avert potential existential risks – will inevitably expand the domain of deterrence options. In other words, techno-economic progress and the escalation of deterrence infrastructure are only formally differentiated. There is no materially persuasive way to improve the world that does not – on its occult side – widen the horizons of geopolitical horror.”
Whatever technology we might devise to save ourselves from natural catastrophe, we will also use on our enemies. What stops us from deterring ourselves to death?