Walter Williams on negative versus positive freedom:
Negative freedom or rights refers to the absence of constraint or coercion when people engage in peaceable, voluntary exchange. Some of these negative freedoms are enumerated in our Constitution’s Bill of Rights. More generally, at least in its standard historical usage, a right is something that exists simultaneously among people. As such, a right imposes no obligation on another. For example, the right to free speech is something we all possess. My right to free speech imposes no obligation upon another except that of noninterference. Likewise, my right to travel imposes no obligation upon another.
Positive rights is a view that people should have certain material things — such as medical care, decent housing and food — whether they can pay for them or not. Seeing as there is no Santa Claus or tooth fairy, those “rights” do impose obligations upon others. If one person has a right to something he did not earn, of necessity it requires that another person not have a right to something he did earn.
What the positive rights tyrants want but won’t articulate is the power to forcibly use one person to serve the purposes of another. After all, if one person does not have the money to purchase food, housing or medicine and if Congress provides the money, where does it get the money? It takes it from some other American, forcibly using that person to serve the purposes of another. Such a practice differs only in degree, but not kind, from slavery.