NURSING ANM AND GNM

Detailed explanation-1: -The Principles of Biology by Herbert Spencer (1864) looked at biology in terms of themes, such as Function, Adaptation and Variation. In this book Spencer introduced the expression ‘survival of the fittest’, in the sense of ‘the most appropriate to its environment’.

Detailed explanation-2: -Spencer was initially best known for developing and applying evolutionary theory to philosophy, psychology and the study of society-what he called his “synthetic philosophy” (see his A System of Synthetic Philosophy, 1862-93).