Estrela asks,"Why are there so many older people in the United States?" When answering Estrela,which is NOT a force that a developmentalist should mention?

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This is not a force that contributes to the increase in older people in the United States. While it is true that minorities now live just as long as whites, this does not explain why there are more older people overall. A, B, and C all contribute to the increase in older people. Life expectancy has risen, meaning people are living longer. The baby boomers, a large generation born between 1946 and 1964, are now entering later life, leading to an increase in older Americans. Fertility rates are dropping, which means there are fewer younger people to balance out the older population.

Estrela Asks,"Why Are There So Many Older People in the United