Until recently people were scared our planet would be outstripped by the weight of a colossal population. Experts feared that by 2026, there would be so many people that we would be starved of resources, and eat ourselves to death. Ironically we now find ourselves in a world where we’re not scared about having too many babies, but rather too few. So what happened?

Follow If You're Listening on the ABC Listen app.

Check out our series on YouTube: https://www.youtube.com/playlist?list=PLDTPrMoGHssAfgMMS3L5LpLNFMNp1U_Nq