Positive Rights vs. Negative Rights

Prof. Aeon Skoble describes the difference between positive and negative rights.  Fundamentally, positive rights require others to provide you with either a good or service.  A negative right, on the other hand, only requires others to abstain from interfering with your actions.  If we are free and equal by nature, and if we believe in negative rights, any positive rights would have to be grounded in consensual arrangements.