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Two great debates--whether population growth is a problem and how to address the problem if one exists--dominated population policy discussions in the 20th century. The debate about whether pitted those who saw rapid population growth as a problem against those who believed the cries of alarm were false. The debate about how was conducted between advocates of the direct delivery of contraceptives through family planning programs and those who counseled a broader, more holistic approach. The debate about how was largely resolved by the 1994 International Conference on Population and Development at Cairo; the debate about whether remains unresolved. Environmentalists, ecologists, and physical scientists generally support the view that rapid population growth is harmful, but economists remain largely unconvinced. Contemporary declines in fertility and the end of the population crisis mentality of the mid- to late 20th century could, ironically, diminish public support for precisely those programs that have been responsible for the rapid fertility decline of the past 3 decades--programs that will be required to complete the "demographic transition" in those parts of the developing world where fertility remains very high.

The great population debates: how relevant are they for the 21st century?