Your first problem is quoting an article that relies mostly on philosophers. Natural rights do not include the right to practice human slavery, they do not include the right to hurt others. Yes I know various people throughout time have exclaimed "it's our God given right to xyz" it's not your "God given right" to own another human or injure them outside of self defense. It is your natural right (call it God given if you wish) to speak your mind, pursue your own destiny, defend yourself (includes others), posses property and be free from servitude.