[A] purely hedonistic utilitarian, like Bentham, might agree with Mill in preferring the experiences of discontented philosophers to those of content… - J. J. C. Smart

Another type of ultimate disagreement between utilitarians, whether hedonistic or ideal, can arise over whether we should try to maximize the average happiness of human beings...or whether we should try to maximize the total happiness or goodness...Would you be quite indifferent between (a) a universe containing only one million happy sentient beings, all equally happy, and (b) a universe containing two million happy beings, each neither more nor less happy than any in the first universe? Or would you, as a humane and sympathetic person, give a preference to the second universe? I myself cannot help feeling a preference for the second universe.

The sentiment to which [the utilitarian] appeals is generalized benevolence, that is, the disposition to seek happiness, or...good consequences, for all mankind, or perhaps for all sentient beings.

Certainly there would be no future suffering on earth if all life on earth ceased. But most people seem glad that they were born: we do not usually think of present people (and animals) that the pain in their lives outweighs their pleasures...There have been great advances in the human condition due to science: recollect the horrors of childbirth, surgical operations, even of having a tooth out, a hundred years ago. If the human race is not extinguished there may be cures of cancer, senility, and other evils, so that happiness may outweigh unhappiness in the case of more and more individuals. Perhaps our far superior descendants of a million years hence (if they exist) will be possessed of a felicity unimaginable to us.