Man's excellence lies in his readiness to let others live and lay down his own life. As he progresses, his food also changes for the better. He has the capacity to grow still further. There have been many more discoveries after Darwin's. The book which you have been reading seems to be an old one. Whether it is old or new, the "Principle of the greatest good of the greatest number," or "survival of the fittest" is false.
In his Letter to Premabehn Kantak, in Collected Works,, Delhi. Ministry of Information (1969-94)., 50:309-10