I was in the NPO over in CN until the last world war that occured totally oblitorated my nation. Since then, I've declared total neutrality and with the exception of a couple of rogue nations that I had to totally cream, I've been prospering.
The NPO has a nice structure over in CN, but their militancy will be their downfall in the long run. There is, also one defect in their whole strategy. The NPO is arranged like an Amway multi-level marketing system - when war results, it's the bottom rung nations that take the brunt until someone at the top starts flinging nukes and then everyone suffers.
As a matter of personal opinion, if the NPO were to pursue a neutrality path, not be so militant and aggressive and only be aggressive to protect its members the NPO would draw members like flies to honey. Conquest will only get you so far - if you lose your powerbase of bottom rung nations, you might end up falling like a house of cards.
Now, if the NPO were to pursue a course of maintaining peace by stomping or sanctioning only rogue aggressive nations, enter into treaties of mutual trade and economic assistance with neutral or otherwise unaligned nations, punish their members who act like total arses, it would change the entire flavor of that game.
OTOH, a course of aggressive militancy is always bound to lead to disaster in the long run. The NPO has not yet learned the benefits of 'peace through superior firepower' and the benefits of being the good guys.
BTW, NPO nations are great trading partners. I trade mostly with them and, in my experience, if one stops trade with you to arrange a better trade agreement, they usually help arrange another trade agreement for you that is equally beneficial. I suspect that it is not NPO policy to do so, but it seems a lot of nations in the NPO do this.