"Are we on the brink of population collapse? Some economists and tech billionaires (like Elon Musk) think so. After all, birth rates are declining, and some argue an aging population could strain social services and hurt the economy. (On the other hand, some say, slower population growth could be more sustainable for our environment.) Whichever argument you sympathize with, here's a key thing to understand about this trend: Demographers predicted it. In fact, they've been expecting for years. Their advice? Don’t freak out. Here’s what changing demographics might mean for our planet and the future. "Please note: In this episode, we're using the word "woman" as shorthand for “people who ovulate.” But it’s important to note that some women don’t ovulate, have XX chromosomes, or a uterus — whether they’re queer, intersex, and, or, have a condition that affects their reproductive traits."