Utah is known as a center of the Mormon faith. Devout Mormons do not believe in birth control.
We could probably write an entire book, about population trends, and reasons behind them.
But the implications for society are profound.
For example, tens of millions of babies have been aborted since Roe vs. Wade. Some think that our illegal immigration problem stems in part from that fact. According to that theory, the fact that people in our native born population were not having as many children as previously, created gaps in our labor markets, which were filled by illegals.
I’ve heard other theories too, along the lines of, people didn’t want large families for various reasons, and reliable birth control allowed for people to have as many, or as few, as they ideally wanted. Surprise 3rd or 4th babies are a thing of the past for significant numbers of people nowadays.
In our consumer-driven economy, those immigrants are more needed as CONSUMERS, not workers. Here in NJ whole school districts would close, and the “no man’s lands” between the urban blacks and white suburbs would be ghost towns. Increasingly, cities themselves would be ghost towns; more and more of them have already seen their last black mayor as the cities become increasingly Hispanic.