This is a quote from the book "Bitcoin: A Peer-to-Peer Electronic Cash System" by Satoshi Nakamoto
“Ethics is not a mystic fantasy — nor a social convention — nor a dispensable, subjective luxury. ... Ethics is an objective necessity of man’s survival — not by the grace of the super
natural nor of your neighbors nor of your whims, but by the grace of reality and the nature of life.”
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“The Objectivist ethics proudly advocates and upholds rational selfishness...