It is you who has a bizarre understanding.
Lets start with stock. Please explain how you can have an ownership interest in an entity that is itself a fictional being created by a state ? There are many ways to hold title to land. There is joint ownership, tenants in the entirety, there are quitclaim deeds and warranty deeeds. Each of these forms of ownership and transfers have been created by the state. Please explain how you hold title to land when the rights and obligations under the title itself are created by the state ?
When you are done with that, please explain how a community property state requires that half your assets belong to your spouse while the other states don't.
Alternately, for non believers, they exist naturally.