It seems fairly common to picture the earth heading to an unstable overpopulation but imo this is only a comfortably narrowed down perspective on large scale problems. Especially for western countries, it is tempting to focus on the global population issue because this is primarily a phenomenon of rural, poor regions, so not their own. The other three mayor factors at play here would unfortunately require to rethink basic economics and this would reach deep down into societies. I suspect some sort of psychological "the others fault" self defense emerging in large. I have to be honest here, i fell for it too at first.
Even if the overpopulation would be the only factor we face, its solution would still be large scale and system questioning because either you throw away any moral standards or you end up creating and distributing wealth in a sustainable way. No, simply the delivery of contraception is no solutions only good healthcare and especially the education of girls/women.