Sage:
If you own something, you have the right to control it. No one else does. Accordingly, there is no such thing as a right to life, happiness, free speech, health care, a job, education, etc. You only have a legitimately enforceable claim on the objects that you own, including your physical body.
How does this fit in with natural rights theory?
You're confusing things a bit.
I don't have an automatic right to life. However, I do have the right to defend myself if someone else tries to injure me.
I don't have an automatic right to food. However, I do have the right to work and purchase food, or grow it myself.
I don't have an automatic right to happiness. However, I do have the right to do whatever I want as long as I don't injure someone else.
For example, if marijuana makes me feel good, I have a natural right to smoke and possess it. (I don't recognize the State ban on marijuana as legitimate, but I also think that smoking marijuana is stupid.)
I do have the right to free speech (even the US Constitution guarantees this.) However, I don't have the right to be able to force a mainstream newspaper to print my articles. I don't have the right to free speech when it would injure someone else, such as shouting in a theater. I never understood why "slander" or "libel" is considered a crime. If I say "X is a criminal", then X should also be free to say his rebuttal.
I don't have the right to force other people to pay for health care for me. However, I have the right to work as a doctor if I choose. State licensing requirements restrict the supply and drive up prices. Health care is expensive because the State and AMA have a conspiracy to restrict the supply of doctors. I do have the natural right to work as a doctor without a license from the State. I do have the natural right to purchase health care from whoever I want, even if they don't have a license from the State.
The health care issue is never accurately portrayed in the mainstream media. Artificial restrictions on the supply of doctors drive up prices. This is never mentioned.
I don't have the automatic right to a high-paying job. However, I do have the right to start my own businesses. I don't need permission from the State to operate a bank. I don't need to hire State-licensed accountants and lawyers to make sure I follow all the silly regulations. I don't have to give up 50%+ of my labor via income taxes and other hidden costs. I'm not barred from manufacturing something just because someone else patented it first.
The right to work is a natural right. Via taxes and regulations, the State steals my right to work. I have a limited right to work under the present system, but not an unlimited right to work.
I do have the right to educate myself and my children however I choose. However, the State demands that I pay for its brainwashing centers (schools) via taxes. State regulation of schools and information restricts my options for educating my children. In some states, homeschooling is banned or regulated. Operating a homeschool business and helping other parents is illegal or heavily regulated.
The bottom line for natural rights is "You can do whatever you want, as long as you don't injure someone else. Owning property is a natural right, becuase otherwise why would anyone ever build or produce anything? Owning more property than you personally need is immoral, but in a free market it's impractical to own too much property; you'd be better off selling/investing your surplus property."
The bottom line for State rights is "People only have rights that the State gives them. You have the right to free speech not because it's a natural right, but because the US Constution says so. People don't own their own labor. Via income taxes, the State has a greater claim to labor than the worker. Via regulations and licensing requirements, the State dictates who is allowed to do which jobs. Via property taxes (rent), people are barred from having full allodial title to their land."
Basically, natural rights are what common sense dictates. State rights are what a handful of people serving their own interests decide you may do.
I have my own blog at FSK's Guide to Reality. Let me know if you like it.