This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
... the benefit of one man achieved at the price of the sacrifice of the other?”

There are four interrelated considerations which are involved in a rational man’s view of his inte
rests, but which are ignored or evaded in the above question and in all similar approaches to the issue. I shall designate these four as: (a) “Reality,” (b) “Context,” (c) “Responsibil ity,” (d) “Effort.”

(a) Reality. The term “interests” is a wide abstraction that covers the entire field of ethics. It includes the issues of: man’s values, his desires...
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