Srila Prabhupada in his commentary on the Bhagavatam (SB 8.5.23) says "survival of the fittest is a well-known principle, but the poor souls of this material world do not know what is survival and who is fit. Survival does not mean that one should die; survival means that one should not die, but should enjoy an everlastingly blissful life of knowledge. This is survival. The Kṛṣṇa consciousness movement is meant to make every person fit for survival."
Two definitions of fit and survival, one is on the physical plane and hence temporary which then makes the word "survival" an oxymoron as nothing in essence survives in this world. We die either now or in 100 years. Therefore "survival" is an apt jargon fit within the spiritual domain and that is very nicely described by Srila Prabhupada.