
China Had a One-Child Policy for Over 35 Years
From 1980 to 2015, China enforced a one-child policy to curb population growth, resulting in one of history's largest demographic engineering experiments. The policy prevented an estimated 400 million births. It created a skewed gender ratio due to preference for male children and led to a rapidly aging population. The policy was relaxed to two children in 2015 and three in 2021.