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The highly acclaimed The Future Population of the World contains the most authoritative assessment available of the extent to which population is likely to grow over the next 50 to 100 years. The book provides a thorough analysis of all the components of population change and translates these factors into a series of projections for the population of the world's regions. This revised and updated version incorporates completely new scenario projections based on updating starting values and revised assumptions, plus several methodological improvements. It also contains the best currently availab

Summarising earlier publications, I draw a rather optimistic picture of the human future on this planet, if priority is given to universal education, and, in particular, to female education. The benefits of a greater focus on education range from a lower desired family size and empowerment to reach this goal, to better family health, to poverty reduction, to greater resilience, to expanded capacities to mitigate and adapt to climate change, and, ultimately, to the emergence of better institutions and social values that are less obsessed with material consumption and violent nationalism and more concerned with cooperation, care and wellbeing. I also show that extended periods of below replacement level fertility are beneficial for long-term human wellbeing, and that the human population is on the path to peaking during the second half of this century and then declining to 2–4 billion people by 2200. As this smaller population will be well-educated, they should be healthy and wealthy enough to be able to cope fairly successfully with the already unavoidable (moderate) effects of climate change.

I propose that the primary goal of twenty‐first‐century population policies should be to strengthen the human resource base for national and global sustainable development. I discuss the shortcomings of the three dominant twentieth‐century population policy rationales: acceptance of replacement‐level fertility as a demographic goal; realizing a "demographic dividend" from the changing age structure; and filling the "unmet need" for family planning. I demonstrate that in all three cases the explicit incorporation of education into the model changes the picture and makes female education a key population policy priority. Population policies under this new rationale could be viewed as public human resource management. I argue that 20 years after the Cairo ICPD the international community needs a new rationale for population policies in the context of sustainable development and that a focus on human capital development, in particular education and health, is the most promising approach.

The global demographic landscape is a complex one, and not surprisingly very difficult for many to comprehend. The media is alive with projections that the global population will reach seven billion people by the end of 2011, and will exceed nine billion by 2050, with much of this growth occurring in the least-developed countries, where a high rate of mortality is outweighed by an even higher rate of fertility. Adapted from the source document.

This is an expanded version of comments on the future of the demography of aging at an invited session of the 2008 annual meeting of the Population Association of America. In an introduction, John Haaga offers reasons for a revival of interest in population aging, including greater realization of plasticity in aging trajectories at both individual and societal levels. Linda Martin proposes that population scientists working in aging emulate those studying fertility and family planning in previous decades, learning from interventions (in this case, aimed at increasing retirement savings and reducing disability at older ages). Changes in family structure will increasingly affect new cohorts of the elderly, and Linda Waite speculates on the ways in which changes in the economy, medicine, and the legal environment could affect the social context for aging. Research on mortality at older ages is "alive and well" asserts James Vaupel, who sets out six large questions on mortality trends and differentials over time and across species. Lastly, Wolfgang Lutz expands the scope of projections, showing the considerable uncertainty about the timing and pace of population aging in the developing world and the effects on future elderly of the increases in educational attainment in much of the world during the second half of the twentieth century.