In 1973, an MIT computer predicted when civilization will end (2018 about 1973)

>"At around 2020, the condition of the planet becomes highly critical. If we do nothing about it, the quality of life goes down to zero. Pollution becomes so seriously it will start to kill people, which in turn will cause the population to diminish, lower than it was in the 1900. At this stage, around 2040 to 2050, civilised life as we know it on this planet will cease to exist."

Looking at recent news and our current battles with climate change, microplastics pollution etc... interesting.

See also:

https://en.wikipedia.org/wiki/The_Limits_to_Growth

https://en.m.wikipedia.org/wiki/Beyond_the_Limits

The Systems Dynamics models make assumptions that simplify almost everything. They still predict collapse in the 2030-2050 time frame. Many people dismiss the forecast because, they say, mankind always has discovered a solutions in the nick of time, but that is neither guaranteed or likely in the case of global warming.