The world is ill-prepared for the global crash in children being born which is set to have a “jaw-dropping” impact on societies, say researchers.
Falling fertility rates mean nearly every country could have shrinking populations by the end of the century.
And 23 nations – including Spain and Japan – are expected to see their populations halve by 2100.
Countries will also age dramatically, with as many people turning 80 as there are being born.
Hellbound and Down 