Unconsciously his instinct will submit to the knowledge that the preservation of the species, even at the cost of the individual life, is a primal necessity and he will protest against the fantasies of pacifist ranters, who in reality are nothing better than cowardly egoists, even though camouflaged, who contradict the laws of human development. For it is a necessity of human evolution that the individual should be imbued with the spirit of sacrifice in favour of the common weal, and that he should not be influenced by the morbid notions of those knaves who pretend to know better than Nature and who have the impudencc to criticize her decrees.