This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...mited task (the task of protecting them from physical force, derived from their right of self- defense).

The citizens of a free nation may disagree about the specific legal procedu
res or methods of implementing their rights (which is a complex problem, the province of political science and of the philosophy of law), but they agree on the basic principle to be implemented: the principle of individual rights. When a country’s constitution places individual rights outside the reach of public authorities, the sphere of political power is severely delimited — and...
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