u-Bob

The only way I ever see the food running out is after a nuclear war or some cosmic disaster. I grow some of my own vegetables, my neighbor grows vegetables, I buy milk from a local farm,... People are still buying to products i sell, I invest, I save money for a rainy day,...

In reality there are natural disasters, accidents, acts of aggression and a limited supply of raw materials (some supplies take millions of years to replenish like oil if we run out, others takes months (vegetables) or years (wood)). One thing that's unlimited: the supply of ideas. Human beings constantly come up with new ways to do things, new and more efficient solutions to old problems. i believe in human creativity and cooperation (aka the free market).

Looks like your lack of faith in humankind has you trapped in some kind of Malthusian nightmare

I agree, and that rule is what Bastiat called "The Rule Of Law", what Jefferson and Franklin called "Divine Rights", what Spooner called "Natural Rights", what Rothbard described as the non-aggression principle, what some call "Rational Rights", what Hoppe refers to as the "Natural Order",.... All different names to describe the same thing, the same solution to the same problem. The problem you just described. And the answer is: every human being is free to do with his body and property what he wants as long as he doesn't cause damage to an other human being or his property.

Is that utopian? No, because we recognize that freedom and justice don't guarantee happiness, but merely offer the best chances for people to become (what they themselves consider to be) happy. We also recognize the fact that acts of aggression are committed and will continue to be committed as long as there are humans, so people also have the right to defend themselves against acts of aggression (and can of course use violence to do so)

We used to have kings that knew what was best for us. We used to have priests that knew what was best for us. Thank God we now have scientists that know what is good for us.