Most of the "western world" already has barely growing or declining populations: https://en.m.wikipedia.org/wiki/Population_decline https://en.m.wikipedia.org/w

Most of the "western world" already has barely growing or declining populations: https://en.m.wikipedia.org/wiki/Population_decline https://en.m.wikipedia.org/wiki/Population_decline What you are proposing is thus an imperialist dictate on African and Asian countries, which is an obvious no go. Instead you should advocate for improved standards of living and flourishing economies in all these countries, which is strongly correlated with stabilizing population levels.