Beginning in the 1960s—and accelerating over the last two decades—changes in marriage, divorce, cohabitation, and nonmarital childbearing have transformed family life in the United States. The family continues to serve a primary role in raising children and caring for elderly relatives. But new family patterns and increased instability are creating complex family and economic ties…

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Dudley Poston is fascinated by China’s “demographic exceptionalism.” The country has the world’s largest population, and in the 70s managed to achieve one of the fastest fertility declines in human history. China’s “one-child” population policy has resulted in a number of unique demographic events and transitions, including an imbalance of the sex ratio at birth….

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Of the 48 least developed countries in the world, 33 are located in sub-Saharan Africa. At the same time, this region stands out with the highest birth rates in the world. By the year 2050, the number of people in the region may double, and by the end of the century it may even quadruple….

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