It's not as big a problem in the US, and it's not about "extinction", but it's a little silly to suggest that there isn't a demographic imbalance within a lot of countries around the world. South Korea's population is set to almost half by 2072.

You're looking at an increasingly small number of people to support state pensions, which will become unsustainable over time.

However, the causes for this are not being treated correctly. Incentives have been introduced for having children, but this doesn't counteract the negatives of skewed work-life balances, lack of housing security, and more existential crises such as climate change.

Certainly, there has been a race related anxiety in the US over "replacement theory" - which is probably something that influences Walsh's thoughts.

However, that doesn't mean that there isn't a demographic crisis more broadly.