A few examples. In the major western democracies of Europe, the native population is declining. Germans, Frenchmen, Italians, Greeks, and on and on. The prosperous Europeans are not having enough children to grow - ore even maintain the population. Unless something changes, within a few generations "Germans" will be in the minority in Germany. So politicians like Merkel are forced to promote mass immigration, so that enough people will be working to pay for the retirement checks for the natives. and in her mind, it doesn't really matter whether the newcomers share "German values," as long as they can get them to be gainfully employed. Good luck with that.
They are also, in various ways, paying the natives to have more kids. Again, good luck with that.
But the problem, global population-wise is not developed countries, but rather primitive countries where large families are culturally desirable, and where measures to wipe out diseases like malaria result in not only more people surviving, but a multiple effect of surviving and making more babies [that they can't afford to support].
If course it is hugely ironic that this presentation - arguably promoting universal use of artificial birth control - takes place in a Vatican conference.
Was Pope Frank asleep at the switch, or is he planning a reversal in decades-old Vatican guidelines? Inquiring minds want to know.