> The one-child policy worked.
and
> It would have been much, much worse without it.
I have my own graph that questions these two (widely made) assertions. It shows the decline in total fertility rates for two countries over the last 50 years. Those countries are China and Thailand [1]. You can see that both countries had almost exactly the same TFR in 1965 (just over 6.0) when both countries were still mainly agrarian societies. Since 1965 both countries' fertility rates have declined remarkably but Thailand did it without the authoritarian policy that caused such a lot of suffering in China. You can also see from the graph that the introduction of the One Child Policy in China in 1980 caused an interruption in the decline, while Thailand's rate continued to decline smoothly. And Thailand's TFR is now slightly lower than China's.
So why was it necessary to introduce the One Child Policy in China when the fertility rate had already been rapidly declining over the previous 15 years and when a country that was in exactly the same position as China in 1965, and whose fertility rate decline between 1965 and 1980 was less steep than China's, then brought their TFR down to below China's in 1985 and in 1990 brought it down below replacement level and now has a TFR slightly below China's, all without implementing such a drastic policy?
[1] https://www.google.com.au/publicdata/explore?ds=d5bncppjof8f...