"How far we are to consider the interests of posterity when they seem to conflict with those of now-existing human beings? The answer to this, though, seems clear: the time at which a man exists can’t affect the value of his happiness from a universal point of view; so the interests of posterity must concern a utilitarian as much as those of his contemporaries."
The Methods of Ethics (1874), Book 4.
~Henry Sidgwick (31 May 1838 – 28 August 1900)
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