Civilisation peaked in 1940 and will collapse by 2040: the data-based predictions of 1973.

In 1973, near the height of the ‘population bomb’ panic, a computing programme called World1 offered up some predictions for the future. It anticipated a grim picture for humanity based on current trajectories. Tracing categories such as population, pollution and natural-resource usage, World1 calculated that, by 2040, human civilisation would collapse – a century after the best year to have been alive on the planet: 1940.