The natural state is that people and other animals can only "own" land that they physically occupy and defend by force. The kind of property ownership where (you can make) other people stay out of your house without your own presence and without involving arming yourself is largely granted by governments and paid for in taxes.

Fortunately most of us are born in a time and place with governments having reasonable attitudes towards property ownership. (That includes myself, but not my parents.) But it's often hard for privileged people to see themselves as such.