This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
... has no right to violate them. Therefore, the invasion of an enslaved country is morally justified only when and if the conquerors establish a free social system, that is, a system based on the recognition of individual rights.

Since there is no fully free country today, since the so-called “Free World” consists of various “mixed economies,” it might be asked whet
her every country on earth is morally open to invasion by every other. The answer is: No. There is a difference between a country that recognizes the principle of individual rights, but does not...
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