Damn. You were pretty much batting 1000 until that
I have the anarchist debate distilled down to one simple scenario:
You and bunch of other anarchists decide to start an anarchy on an island. How are you going to defend the island? (this was tried back in the 1970s by the way)
I'm not sure what "start anarchy" means.
Anarchy is not something someone starts, it's what is, right here already. There does not exist any special subset of society that has the moral right to rule over others without their consent. There are people who do use force to rule over others (e.g. muggers in dark alleys, criminal gangs, states), but by doing that they violate the Creator's moral law. Their claim of a moral license to rule others is false. They are not archons, they are just people, no different than the people they victimize, and are subject to the same objective and universal moral law as everyone else. Such archons as they fancy themselves to be simply do not exist within the human race apart from Jesus Christ whose kingdom is not of this world. Being an anarchist means adhering to a moral law that permits me to point at the actions of those falsely called archons and call them wrong. Whether I am able to stop those actions, or even ought to try to stop them, is an entirely different matter.
If I lived on a stateless island and it was invaded by a conquering nation bent on establishing a regime there to subjugate us under its rule, then the same anarchy that tells me I am not permitted to subjugate my countrymen by force and rule them is what tells me that foreign invader is not permitted to either. If I weren't an anarchist, I couldn't even say those invaders were doing anything wrong, as I would concede that their might makes them right.
But there are a few points to consider about the scenario:
1. I don't believe that this island being stateless makes it a better target for invasion than an island with a centralized ruling regime would be. The scenario with the centralized ruling regime would have the infrastructure of statehood in place so that all an invading force would need to do is conquer that regime. But in the stateless island the invaders would have to conquer each sovereign individual. Now, I'm not sure what anarchist island in the 1970's you're referring to. But let me go out on a limb and take a guess that the invading force they were unable to repel was an existing nation-state that claimed sovereignty over that island and didn't accept the claim of its inhabitants to be outside of its rule. And if this is the case, then as a thought experiment, consider the hypothetical alternative of that very same island, with the only difference being that the new order there was not anarchist, but rather a state in which some subset of the people conquered and subjugated the rest under their rule, establishing a central ruling regime, and consider what that other already existing nation-state that claimed sovereignty over that island would have done in response. They would have still reclaimed it, and they would have still succeeded. The presence of a state there would have done nothing to prevent that, and in fact it would have made it easier, not harder.
2. Whatever measure of defense a state could muster, if the subjects of that ruling regime in large part support those measures, would still be possible without the presence of a state. And in fact, the demand for those measures would ensure that the market would provide them. I decline the gambit of trying to predict exactly what these free people would do. The beauty of the market, and one of its great advantages over central planners, is that it provides goods and services in unexpected and unplannable ways that no committee of even the best central planners would be able to come up with. The same rule would apply to defense as much as it does to
pencils. We can imagine all sorts of voluntary contracts and defense companies and such, and I'm sure that anarcho-capitalists have written a fair bit teasing out some of the possibilities. But at the end of the day, what the market would provide would be better than anything we could predict. The market may not provide a solution that would be effective in defending this particular island. But however ineffective the free market would prove to be, a state-based alternative would be even less effective.
3. Statelessness, or something very close to it, was the norm for most human beings throughout most of humanity's existence. It isn't some modern fad that some extremists in the 70's decided to experiment with. The status quo that we now take for granted of a globe that's divided up among nation-states without an occupied acre to be found that's unclaimed by them, is a very recent development. The process by which the earliest states developed took millennia, and their attempts to conquer stateless people proved to be overall very ineffective. There was a tenacity to humanity's statelessness that led to greater costs than benefits to those who tried to replace it with states. And even after those earliest states developed, their rule only extended over what amounted to a minority of the human population for additional millennia. When successful empires (and even here success typically meant a lifespan of mere decades) did manage to expand, they did so more successfully by conquering existing states than they did by nitpicking at stateless peoples in their hinterlands whose numbers added up to a majority of the human race until not many centuries ago. This truth is sometimes hidden by the fact that ancient written history tends to present things as seen from the vantage points of those within the emerging states, and not those silent masses outside them.
Personally, I'm a follower of Jesus Christ, and the path that he leads me on is the one that leads to the cross. His victory over his enemies didn't come by his killing of them, but by their killing of him. They demanded his allegiance, and they expended every tool in their tool chest, the most powerful one being the taking of his life, and never attained that allegiance from him. He rose from the dead victorious over them and offers that same victory to all who follow him as their king, and not the powers and principalities of this dark world.