Meh... Chicken & Egg. The result of Chicken requires a cause of Egg. The result of Egg requires a cause of Chicken. Life’s been working this way since we formed the ability to ask stupid questions :-)

I get the point you’re trying to make but unfortunately the facts do not agree. If every living human being lived with the population density of Paris the entire human race would occupy an area the size of Louisiana, Mississippi, and Arkansas combined. That leaves an awful lot of room.