Demographic Winter tells how the global birthrate is declining with such ferocity, that many nations may cease to be—not through invasion, but simply because there are not enough children being born to replace the aging population. The effects will be severe and long lasting and are already becoming manifest in much of Europe. In Japan, the situation is already at a crisis level. Demographic Bomb builds on the previous one in that it explains more about the “Inaccurate Assumptions” of over population.