2)Unavoidable

3)Wars of the future fought by autonomous robots not fresh&blood human.

  Automation and  economic productivity are more important than size of labour force

4)Large popn means drain on war resource and environment damage

5)Those who want to pre-maturely abandon the 1-child policy are of 2 types:

a)Uneducated on demography and ignorant b)feudal die-hard who prefer boy over girl children