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It has been estimated that since the 1970s approximately 163 million girls have not been born due to sex selective abortions. In other words, couples waited until an ultrasound could determine the sex of the fetus and aborted because the fetus was female, resulting in 163 million girls not being born over the last 30 years.
It's been clear for the last few years that the seven billion mark was imminent, and because we've been inching toward it for some time, many will ignore its larger implications. How will we handle all this extra demand for resources?
China's 4:2:1 problem is ours, too, just with a different name: A glut of people are growing old and there are fewer of us to pay for their care, while also having to save for our own retirement. At the personal level, there are more of us without siblings shouldering the costs of care for aging parents.