If people continue to breed as they currently do, we're going to be just fine. Birth rates globally are on the deline. As education (espcially education of women) becomes commonplace in a country, birth rates drop. We are in no danger of over populating the planet. Depending on the projection, "peak people" just might be within our lifetime.
With advancing technology. why can't everyone have a high standard of living? Technology & weath are not a zero-sum game. More people with education & skills raise the standards for all. (If you disagree, explain to me where all the silicon valley wealth was durring the stone age.)
Stop worrying about how big your slice of the pie is. Let's make the pie bigger for everyone.