> Luckily, have examples like Mechai Viravaidya in Thailand, who helped lower their population growth from around 7 children per couple to below 2 through voluntary means -- think the opposite of China's One Child Policy -- leading to greater stability and abundance.
South Korea, Vietnam and the Philippines follow the same general population decline curve from the 1960s to now, that Thailand has followed. They all began at close to the same change rate circa 1960, all between 2.9% and 3.3%. Thailand's drop has been more pronounced since 2000 than Vietnam, however that can properly be attributed to the huge difference in standard of living between the two (the decline in Thailand matches the decline also seen in South Korea).
Did most countries in Asia have their own Mechai Viravaidya? They all simultaneously drop from 1960 onward. Or is this person getting credit for something that was happening regardless and has a lot more to do with increased economic prosperity? Which is something we already know is the primary natural change agent for lowering population expansion. Thailand's GDP per capita skyrocketed after 2001, whereas eg Vietnam and the Philippines followed slower trajectories (until recently). Thailand actually saw an increase in its population growth change rate in the 1990s (1993-2001), before the economic boom that began in 2001 pushed it back down again. The population change rate in Vietnam and Thailand were nearly identical until Thailand's economic boom began in 2001 (also, Thailand's rate wasn't much lower than Indonesia circa 1998-2000, they've split both economically and on that pop change rate from 2001 forward).