The term ‘survival of the fittest’ is often used to describe the process of natural selection, a concept introduced by Charles Darwin. Another term for this concept is ‘natural selection’ itself. Natural selection refers to the process by which organisms better adapted to their environment tend to survive and produce more offspring. Over time, this leads to the evolution of species as advantageous traits become more common within a population.
In essence, ‘survival of the fittest’ and ‘natural selection’ are closely related terms that describe the same biological process. The phrase ‘survival of the fittest’ was coined by Herbert Spencer, a contemporary of Darwin, and it emphasizes the idea that only the strongest or most adaptable organisms survive and reproduce.