This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
..., they must accept the basic social principle without which no moral or civilized society is possible: the principle of individual rights. (See Chapters 12 and 13.)

To recognize in
dividual rights means to recognize and accept the conditions required by man’s nature for his proper survival.

Man’s rights can be violated only by the use of physical force. I
t is only by means of physical force that one man can deprive another of his life, or enslave him, or rob him, or prevent him from pursuing his own goals, or compel him to act against his own ra...
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