The Natural Increase of Mankind

The Natural Increase of Mankind

The Natural Increase of Mankind

The Natural Increase of Mankind

Excerpt

Dr.Sweeney dissertation on "The Natural Increase of Mankind" is based on work for his Doctorate of Science in Hygiene done in the Department of Biometry and Vital Statistics under the direction of Professor Raymond Pearl in the School of Hygiene and Public Health of the Johns Hopkins University. Its publication has awaited for several months the preparation of the introduction which Dr. Sweeney kindly asked me to write.

Although the subject is somewhat remote from my own special studies, its bearings are so broad that it comes within the field of interest of every student of hygiene. Indeed no branch of inquiry surpasses the population question in the extent and the importance of its contacts with so great a variety of problems--biological, sanitary, economic, political, ethical and social --nor is any aspect of this question more important in its relation to national efficiency, prosperity and happiness and to great world issues of peace between nations, than the consideration of all that concerns the growth of population.

As Marshall in his "Principles of Economics" remarked thirty-five years ago, Malthus' "Essay on the Principle of Population," published in six editions from 1798 to 1826 during his lifetime "is the starting point of all modern speculations on the subject" and "his work has the merit of being the first thorough application of the . . .

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