Re the above, I see it differently.
Managing slaves by force is inefficient, so too is managing millions of years of evolution by force.    

Just like In a free market price expression is information expressed by supply and demand in the market, it needs to be free to work, if and for whatever reason a monopoly should exist, and the market equilibrium mechanism is destroyed.
  
Just like there are those of us that are stronger and cleverer and better manipulators than others, there are those of us, who have different intelligences, the result is while collectively trading the variety of intelligences, we will create abundant prosperity, and for whatever reason if a monopoly should exist allowing the manipulation of labour/ intelligences, the market equilibrium mechanism is destroyed.

Rights protection is for the benefit of the individual, no right can be given to someone at the expense of denying it from someone else, and to do that requires an authority.  

My conclusion is the rights afforded to property can be no different from those inherent in nature, I see violence as an expression of an imbalance, I don't see violence as a threat like the early New World settlers see it, it is a Peaceful way to maintain checks and balances.