If on the other hand one justifies the war on drugs because the Bible tells me so, then I have serious philosophical differences with the utterer of that argument. If the Old Testament tells us anything it tells us that God's chosen people, even that divinely selected group, spent most of its history either ignoring, willfully breaking, or misinterpreting God's laws. Whatever the source of apostasy, the lesson is clear, if you would impose your version of holy writ on me, I will rebel and I have no doubt you would do the same. Thus we have the option of having a First Amendment society or a 30 Years War. History teaches us that the former is infinitely preferable.
My position is clear, the war on drugs does profound harm, more harm than good to our society in ways we have not even considered and, to a religiously committed man, ways that are eschatologically meaningful because it is lethal to the very core of individual salvation and drives our society ever further from God. The law provides no salvation to the wicked, no guarantee to the law-abiding.
People can differ as to whether the Noahide imperatives include a frontal battle on drugs. I still would say no, they don’t, based on New Testament illumination. The action of pushing drugs (and it is called pushing for a reason) would be a different story.
And... I am not giving a full on defense of “drug war” here. I assert very strongly that there are spiritual ways out of needing to wage one. I am pointing out pitfalls that would be entailed in the effort to move out of where we are now. This frying pan stinks. The fire would stink worse. Be careful.