...upon further increase. (3) Owing to the law of diminishing returns, a larger number of people cannot, in any given state of civilization and the industrial...necessaries, comforts, and luxuries of life for each one. (6) How rigidly the increase of numbers is held in check by this motive depends upon the ideas of the...

...upon further increase. (3) Owing to the law of diminishing returns, a larger number of people cannot, in any given state of civilization and the industrial...however, opposed and held in check by several contrary jnotives, not the least important of which is the desire for the customary goods to consume, coupled...

...industrial arts, be so well provided for from the produce of a restricted area as a smaller number can. 4. There is a strong natural instinct which inclines...the least important of which is the desire for the goods which one has been accustomed to consume, coupled with the perception on the part of each head,...

...counteracted by other motives, it will lead to an increase of population beyond the limits within which comfortable subsistence is possible. 5. This natural...the least important of which is the desire for the goods which one has been accustomed to consume, coupled with the perception on the part of each head,...

...is migration to new soils or an expansion of commerce that will bring subsistence from wider areas. 5. This natural instinct is, however, opposed and held in check by several factors, leading in some measure to birth control. The first and greatest agency of birth control is...