Secularism kills birth rates.
I definitely think there is something about the culture of prosperous industrialized (or post-Industrialized) societies that kills birthrates. People have it so good (even if they are “workaholics”) that they focus on ME rather than their duties to others or (gasp!) future generations. In fact, how many people even talk about future generations? Very few. Most do dwell on things like “crimes” people commit against the the Earth, animals or indigenous peoples. In fact, there is a strong undercurrent of self loathing, which liberalism certainly taps into. This self loathing makes it taboo to actually defend one’s culture, or even ones’s self—which gives us Political Correctness.
It is almost like humans are programmed to destroy their own Utopia to bring about a new Dark age. I hope that is not true, but it very well could be.