This book has an active table of contents to access each chapter of the following titles:

1. 
   

   The Origin of Species – Charles Darwin

   
   


2. 
   

   The Principles of Biology: Volume 1 and 2 – Herbert Spencer

   
   

The most well-known work An Essay on the Principle of Population was published by Malthus in 1798. Malthus argued that increases in population would eventually diminish the ability of the world to feed itself and based this conclusion on the thesis that populations expand in such a way as to overtake the development of sufficient land for crops. The theory of natural selection by Charles Darwin and his book ON THE ORIGIN OF SPECIES was influenced by Malthus' analysis of population growth. Malthus was often misinterpreted, but his views became popular again in the 20th century with the advent of Keynesian economics.

Darwin published the book On the Origin of Species in his 1859 and successfully unified the theory of the life sciences and social science by explaining the diversity of life. After its publication, the book not only sent an unmatched impact to Biology but also to economy and social science.

Today, the scientific community and much of the general public have accepted evolution as a fact. Darwin’s scientific discovery had influenced many later economists including Herbert Spencer and Thorstein Veblen in many ways.

Darwinian evolutionism is one of important intellectual strands that run through many works of later economists. The elements such as natural selection, the struggle for existence, and the survival of the fittest in Darwinism tells us that individuals have little or no control over the forces of change.

In 1864, Spencer wrote the book Principles of Biology and first coined the phrase survival of the fittest. In the book, he explored the model that human intelligence was something that had slowly developed as a response to its physical environment. He also drew parallels between his own economic theories and Darwin's biological ones.

The book contains the important works about biology and Social Darwinism by Charles Darwin and Herbert Spencer, two of the greatest biologists and sociologists on the planet. The works in the collection were widely used by students of psychology to study biology and Social Darwinism.

This book is also for the readers who are interested in analyses of an economic system from an evolution approach and the deepest thoughts of human evolution process by Charles Darwin and Herbert Spencer, two of the greatest thinkers on the planet.