Land ownership entirely. Forgive my slip of the tongue when I said "my", and let me replace it with "the". The essential being of the land remains the same regardless of what word I use to refer to it. You are neglecting the fact that it is impossible to live in the modern world, bar living in forced squalor, without some semblance of land ownership when you try to play the fact that I participate in the system against my views.

This is a common misunderstanding of people pro-establishment when talking to people anti-establishment: "Well, how can you be against X when you participate in X!" It's because the system is set up so there is no sensible way of living without X. It doesn't mean that a world without X is impossible.

The earth is the earth. It doesn't belong to any specific person, government or nation. An insect "owns" as much of the earth as you or I do.

I believe that national borders enable extreme exploitation of the working class. I believe that land ownership, especially (but not exclusively) when paired with multiple property owners, enables an extraction of wealth towards the ruling class (whether it be through property taxes or rent) from the worker, with no benefit to the overall society beyond some figures in a banking account growing an extra digit or two.

There have been many, many times in the hundreds of thousands of years throughout human history that long periods of harmony have existed without a concept of land ownership and the idea that land being owned is somehow essential to society or life is very incorrect. It's just not compatible with capitalism and all that entails.