This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
... group activity.

Dictatorship nations are outlaws. Any free nation had the right to invade Nazi Germany and, today, has the right to invade Soviet Russia, Cuba or any other slave p
en. Whether a free nation chooses to do so or not is a matter of its own self-interest, not of respect for the nonexistent “rights” of gang rulers. It is not a free nation’s duty to libera te other nations at the price of self-sacrifice, but a free nation has the right to do it, when and if it so chooses.

This right, however, is conditional. Just as the suppression o...
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