No they dont own themself there is no such thing in nature as owning yourself. It's something we have agreed upon over thousands of years but you don't actually own yourself.

If you are the strongest you can stand for yourself but there is no natural law that prevents someone from making you a slave of them.

No ones saying that in the law of the jungle that isnt the case. It's different rules there for sure. But thats why we have progressed to where we are today.

Since We live in a western democratic civilization, and there are laws against that very thing, I'm not sure what you are trying to say.

What I am saying is that the theft discussion is defined by society and the laws of society. So you can't claim that Tax is theft.

Then neither is tax avoidance.

Not naturally no. Only be the law of society just like ownership is given by society and doesn't exist "out there"

I was responding to a claim that tax is theft if theft is defined by involuntarily giving something up.