It is not essential that we retrogress to a state of social, educational or ethical inferiority in order to enjoy the physical fitness frequently seen in half savage peoples. Too much emphasis has been placed upon the beneficial effects from the standpoint of health, of hardship and exposure to which primitive man was of necessity subjected. Hardship and exposure never did anyone good. Protection from the elements is conducive to health, as is also freedom from excessive exertion. The factors which have tended to reduce civilized man to a state of physical inferiority as compared with his barbarous forebears are in great measure due to changes in the character of his diet. We can easily regulate our daily fare to be essentially optimal from the standpoint of meeting the chemical needs of the body, and at the same time to make it of a nature which will necessitate chewing for the express benefit of the development of the jaws and teeth.