You fundamentally misunderstand Locke (whom Jefferson wasparaphrasing). The natural rights are inherent to all people, they aregranted by God, not by the government, and they pre-exist before anygovernment is formed. The right to life simply means that thegovernment cannot arbitrarily deprive someone of life (or liberty, orproperty) and must make a reasonable effort to protect citizens fromviolence.
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Just because I don't agree with your or Locke's definition of the right to life, doesn't mean I misunderstood anything. Jefferson's understanding of it is debatable. And why is it that just the government can't deprive me of my natural rights?

How about you tell me your understanding of a civilized society.