Among Frenchwomen born in the early 1960s, only a third had at least three children. Yet they were responsible for more than half of the next generation because so many of their contemporaries had just one or even none at all. In the United States, one-fifth of women born in the 1950s ended their fertile years without giving birth. 17% of women from the Baby Boomer generation had only one child each and were responsible for only 8% of the next generation. On the other hand, 11% of Baby Boomer women gave birth to at least four children each, for a grand total of one-quarter of the Millennial generation. Those who had many children were likely religious (especially practicing Christians) while those who chose to remain childless were often members of countercultural or feminist movements of the 1960s and 1970s. Because parents wield a great deal of influence on their children, this will likely cause cultural, political, and social changes in the future. For example, by the early 2000s, it had already become apparent that mainstream American culture was shifting from secular individualism towards religiosity.