Produced in 1972, we knew even then that we needed to rein in the unfettered exploitation of this planet and it’s resources. It predicted collapse around 2040, which seems pretty on point given how things are going.
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They modeled a number of possible futures, including the set named BAU, but they did not pick a particular one. In fact, the implicit assumption was that, collectively, we would prevent BAU from happening, as implications were so dire. The rest is history.