Is All Weapons Research Acceptable?

I am deeply and fundamentally in agreement with the argument. I would like to know as an engineer who does research how it guides me with respect to the choices of research, in particular, research on weapons and what classes of weapons. Is all weapons research acceptable if it helps sustain the created order within the context of natural law or, better, just war? The argument does not go far enough to enable one to make correct choices unless you say that all choices are acceptable