The Limits to Growth theory, which was published by Donnella Meadows et al, suggested that the population of the planet will begin to collapse around 2030-2050. The deadline for addressing this was way back in 1972 when the book was first pulished. Global industrial production peaked in the early to mid-2010s and global procurement of services peaked in the mid 2010s. Nonrenewable resources are necessary to allow for food and industrial production to take place, and they have depleted rapidly since 1900. As the world runs out of the resources it needs to sustain its global civilization, industrial production and food production will decline very rapidly, while population will expand for one more generation and peak at 8.5 to 8.75 billion before collapsing calamitously as deprivation takes hold.