Watch Cineb. "Birthgap - Childless World" sets out to understand why birthrates have been falling across the industrialized world and beyond for decades through a journey of discovery across 24 countries. Combining deeply personal interviews with demographic trend data, a common picture emerges of what has been happening to communities across the globe. The documentary then explores the consequences for young and old alike and how our future world will be very different to the one we have become used to