Yeah, but I had a final question--will Gentiles who could have procreated, but refused to, be judged. I want to see what Chaim thinks on that.
The Rabbis of the Talmud do not believe that righteous gentiles will be punished if they decide not to have children. The righteous gentiles will be blessed if they do have children, but will not be punished if they do not.
I'll try to explain this with an analogy:
There are elite fighting units in the Israeli army. All of the soldiers in the units are volunteers, because the training is so vigorous and harsh, and because these units are placed in the most dangerous combat situations. If someone volunteers for these units, they are "blessed" by Israeli society as heroes and the finest soldiers in the military. But if someone does not volunteer, no one blames them or punishes them or condemns them. In other words, you get blessed if you volunteer, but you don't get scorned if you don't.
The righteous gentiles who have children and raise them properly will be blessed and rewarded. But those who don't will not be punished.