I think it’s possible that nation states are inherently unstable. An improvement on monarchy, but still vulnerable to oligarchy.

I’m not sure what the future holds, or what comes next, but I suspect that federation will play an important role.

While I appreciate that Marx made a case, this is not data or evidence. It seems intuitively true, but that doesn’t really move you closer to real proof.

What would count as real proof, if not prices falling due to competition?

I’m not sure if you are trying to imply automation is a good or bad thing. Looking through history, the industrial revolution was bad for the workers of the time, but in the long run massively improved the living standards of everyone. Automation is a net good in my opinion. Competition is simply an accelerator, this is not really tied to the economic system being used. In capitalist or communist systems, firms that are protected from competition (by what ever means) do not innovate as fast or as effectively (see Intel as a great example of this).

I’m not arguing whether automation is “good or bad,” I am strictly speaking about the inherent unsustainability of Capitalism. Automation is good, but in Capitalism is used to purely benefit Capitalists, as wages stagnate with respect to ever-climbing productivity.

While this can be true, it is not necessarily true.

Why would it not be true? This still doesn’t explain why you stated Communism to have a poor track record, no AES state has yet made it to Communism, as Communism must be achieved globally.

As your population ages, the costs to care for them raise at an increasing rate. If you don’t have enough new workers to stabilize the economic base, the burden that an aging population places on the younger generation grows until it becomes untenable.

Again, this has nothing to do with Socialism or Communism. It seems to be referring to welfare for elderly people, which exists in all systems.

This is a fundamental and critical misunderstanding of what Communism is, and what Marx refers to as a State. Marx makes himself clear in Critique of the Gotha Programme, but the State for Marx isn’t just “government.” Marx was vehemontly anti-Anarchist, not out of principle disagreements, but on a practical and rational basis.

For Marx, the State is the element of government by which class society sustains and protects itself. Ie, private property rights, and the police that protect it. Communism would have a government, its own police, and its own structures and administration through central planning. The State whithering away, as Marx puts it, is the slow lack of retaining the former elements of class society. For example, we no longer have Streetlamp Lighters, as streetlamps are electric now. This wasn’t because they were targeted and eliminated, but simply fell out of favor with the progression of society.

Once power is obtained it’s never willingly dispersed. This has been the fate of existing all communist governments

This right here is the crux of your misunderstanding. Carrying over from the whithering away elaboration from my last paragraph, the government is not supposed to intentionally collapse itself, it’s supposed to remain a democratic worker government, and continue to be built up over time.

Different AES states have seen their own issues, but none of them have been due to “not willingly giving up power,” which is a fundamental misconception of how these AES States function, or what the Marxist path to Communism truly is.