Organs and functions will change or become evolved by natural selections; that is, where it is a matter of life and death. But where the selective agencies depend upon other things, an organ may be used or abused for thousands of successive generations, and yet the natural inherited organ of the new-born child will be identical in development and function to that of the remote ancestor. [Sidenote: Acquired characteristics are not inherited] There are abundant proofs that so called "acquired characteristics" are not inherited. Were acquired characteristics inherited, Chinese women would be born with small feet and the babies of the Flathead Indians would inherit the flat head which has for generations been produced by binding a flat stone on the soft skull of the new-born infant. In the light of this fact we may understand how it has been possible for man to live through the varying dietetic habits and customs that the constantly changing ideas and tastes of civilization have thrust upon his physical organism. Each individual has transmitted to his offspring the same type of digestive organs and functions that he himself inherited from his remote anthropoid ancestors. [Sidenote: Meaning of expression "natural" diet] Thus, such terms as "back to nature," "natural diet," etc., only mean to the food scientist the habits of life or the dietary which is most suited to the unperverted physical organism of man. They do not imply the meaning that is popularly given to the term, of casting aside all the habits and customs of civilized man, but only the adapting of these customs to the inherited physiological organism of man. Indeed, science may actually improve upon primitive conditions, and still not be inconsistent with the requirements of the inherited physiological machine. No intelligent man will dispute the advantage of a house in a snowstorm. Yet the house is artificial. It is not "natural" in the sense that the term is commonly used. Or, again, man has by the aid of civilization rendered it possible for us to use foods far removed from their source of production, or, by preservation, to have them at seasons of the year when nature does not provide them. These artificial results of civilization are good. They are a part of the story of evolution, the benefit of which no one can question. [Sidenote: Man's dietetic development] But the great majority of the dietetic "frills" of modern man are actually unsuited to his physiological make-up, and exceedingly harmful. They have been developed as have habits of drink or personal adornment and may be in direct antagonism to the ultimate well-being of the human race. I have briefly reviewed the history of the evolution of man. The facts to be remembered are: 1 That men are descended from earlier and more primitive types of beings and are governed by the same general laws of heredity and nutrition as are other forms of animals