In 2017, the U.S. birth rate hit a record low for a second year running. Birth rates are declining among women in their 30s—the age at which everyone supposed more Millennials would start families. As a result, some 500,000 fewer American babies were born in 2017 than in 2007, even though more women were of prime childbearing age. Over the same period, the number of children the average American woman is expected to have fell from 2.1 (the so-called replacement rate, or fertility level required to sustain population levels without immigration) to 1.76. If this trend does not reverse, the long-term demographic and fiscal implications will be significant.

A more immediate concern involves the political consequences of loneliness and alienation. Take for example the online hate and real-life violence waged by the so-called incels—men who claim to be “involuntarily celibate.” Their grievances, which are illegitimate and vile, offer a timely reminder that isolated young people are vulnerable to extremism of every sort. See also the populist discontent roiling Europe, driven in part by adults who have so far failed to achieve the milestones of adulthood: In Italy, half of 25-to-34-year-olds now live with their parents.
- KATE JULIAN, Why Are Young People Having So Little Sex?, Atlantic, DECEMBER 2018

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