This paper assesses recent arguments that sustained fertility decline
cannot occur in circumstances of inequality, insecurity, and injustice
. Naturally, these conditions are to be abhorred. However, the empiric
al record suggests that none of them acts as an absolute barrier to ma
ss adoption of birth control and subsequent fertility decline. Recent
trends in Bangladesh illustrate this point most vividly. One of the gr
eatest fallacies of many fertility theories has been the assumption th
at there is an economic or social imperative in underdeveloped countri
es for couples to have many children. To the contrary, the historic no
rm for all societies has been an average of only about two surviving c
hildren per woman, implying an adaptation to low, not high, net fertil
ity.