Darwin's Theory Of Natural Selection

188 Words1 Pages
In this book, Darwin emphasized that natural selection is the major element of his theory, since it elucidates the connection between variation and the evolution of a species. Borrowing ideas from the theory of exponential population growth by English cleric and scholar Thomas Malthus, he argued that the chance of infinite growth of population sizes is dependent on the geography and natural resources. If these are limited, an infinite number of organisms will not be permitted to survive. As a result of limited food, water, shelter, and other resources, species must struggle for their existence and compete for their survival. According to Darwin, this will decide which species will survive and which will become extinct. Those organisms that