Montagu, A. (1956). The Darwinian theory of evolution. In A. Montagu, The Biosocial nature of man (pp. 23-30). New York, NY, US: Grove Press.
http://dx.doi.org/10.1037/14539-005
Darwin's epoch-making book was published on November 24, 1859, and was entitled On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life. Here, at once, in the very title of this famous book we perceive that it was taken for granted that some races will be favored in the struggle for existence while others will not. Those who have the necessary adaptive fitness will survive, those who do not will tend to leave a smaller progeny behind them and even die out. The implication here is that man is a naturally competitive creature who has attained his present high estate through competition, and if he is to make any progress, he must continue to compete. This chapter discusses the Darwinian theory of evolution in further detail. (PsycINFO Database Record (c) 2016 APA, all rights reserved)