Global population will peak in 40 years, and then sharply fall.
Assuming no rebound in births by 2060-2070 we are expected to see the global population peak at around 10.4 B. However, this will quickly be followed by a dramatic collapse in the population in which humanity can expect to lose 50% of its population in 100 years.
How will governments be able to cope with such a dramatic change in demographics. What will the world look like in a hundred years given a significantly less populated planet.