Comment: "who don't believe that

"who don't believe that natural rights are indeed rights?"

Who doesn't believe you have a right to eat, provide shelter for yourself and your family and the right to defend against aggressors? Find me one person who doesn't agre and maybe we can talk.

Think of a right as a NECESSITY of life.

"Can you force others to accept your definition of natural rights?" See above answer.

"Isn't that basically saying that your rights only exist to the point that you can defend them"

No, a right is a right. Enforcement of that right is different. You are talking about whether or not you will be successful with your rights. Some will, others won't. Not everyone is successful at finding food, providing shelter and defending themselves. But the rights still remain with them.

Government is a different story because they are delegated to protect the rights, and with that respect if they don't do their job, you have to.