Monday, be prepared for a challenge to the conventional wisdom on worldwide population problems. Our guest is the conservative journalist Jonathan Last, who's worried we're not having enough babies. Fertility rates have been dropping for decades with some quirky results: adult diapers are out-selling baby diapers in Japan and in America, pets now outnumber children more than four to one. We'll reach a population peak in about 85 years, but after that, Last says we'll begin an inexorable decline that could have serious consequences. He joins us to talk about what he thinks we can expect when no one's expecting.