SOCIAL AND CULTURAL ASPECTS OF POPULATION CHANGE
What causes a change in the rate of population growth? Research on birthrates sconce both fecundity, the biological capacity to reproduce, and fertility, nonintellectual of reproduction. Fecundity varies greatly between. individuals, but we have no evidence of differences between large population groups Since our biological capacity to reproduce appears to be constant,and cultural factor must explain most variations in birthrates and death rates.