One-Child Policy
China's 1979–2015 limit of one child per couple, the largest state control of reproduction ever, now blamed for its looming demographic cliff.

For 35 years, one of the world's largest governments told most of its citizens how many children they were allowed to have, and the permitted answer was one. China's one-child policy, in force from 1979 to 2015, was the most sweeping intervention into human reproduction any state has ever attempted. It ran on a machinery of carrots and clubs: birth permits, cash bonuses for compliance, ruinous fines for a second child, demotions for officials who missed their quotas, and, at its cruelest, forced sterilizations and late-term abortions. The name oversells its reach: rural couples whose first child was a girl were often allowed a second, and ethnic minorities faced looser rules. The heaviest hand fell on the cities.
The Malthusian panic
The policy was born of fear. In the late 1970s China's leaders, newly committed to Deng Xiaoping's economic modernization, convinced themselves that runaway population growth would devour every gain. Borrowing Western neo-Malthusian models, they treated births as a number to be engineered downward. Beijing later claimed the policy had prevented some 400 million births. Many demographers doubt that figure, for a revealing reason: China's fertility had already collapsed in the 1970s, from around six children per woman to under three, before the one-child rule began, pushed down by an earlier and gentler "later, longer, fewer" campaign. Much of what the policy took credit for was happening anyway.
The costs
The unintended consequences were severe and are still unfolding. In a culture with a strong preference for sons, the one-child limit collided with cheap ultrasound to produce widespread sex-selective abortion. The result is one of the most skewed sex ratios on earth: by 2015 China had between 32 and 36 million more men than women, a generation of "bare branches" who will struggle to ever marry. Scholars count tens of millions of "missing women" never born.
Then there is age. By compressing into a single generation a fall in births that elsewhere unfolded over many, China built a top-heavy population at brutal speed. The weight lands on the "4-2-1" family: one child who may someday support two parents and four grandparents alone. China's working-age population peaked in 2015, the very year the policy ended, and has shrunk every year since.
Too little, too late
Alarmed, Beijing reversed course. It raised the limit to two children in 2015, to three in 2021, then scrapped limits entirely. Nothing worked. Births hit a record low of about 9.56 million in 2022, and the fertility rate now sits near 1.0, among the lowest on earth and far below the 2.1 needed to keep a population stable. Sky-high housing, long hours, and a generation raised to see one child as normal have proven far stronger than any state slogan.
The deepest lesson is about sequence. A country usually grows rich first and ages slowly afterward, buying decades to build pensions and savings before its workforce shrinks. China did the reverse, deliberately speeding up its own aging while still a middle-income country. That is the meaning of the phrase now haunting its planners: China will grow old before it grows rich. The policy meant to secure the nation's future may instead have mortgaged it.