ABSTRACT
Previous to the development of modern science, ideas of human nature that took little account of the original nature of man were common. According to one theory, nothing could be accomplished since everything was supposed to be predetermined. This idea, originally set forth both by theologians and philosophers, has been supported in part by some scientists who believe in the theory of hereditary determinism ; but it has almost never been a guide in practical life. The attempt to educate anyone implies a practical belief that the person will be different because of the educational practices used. This accords with scientific conceptions as well as with common sense.
