Two dates to note:
In 1948, Ray Kurzweil was born. He proposes that comprehensible human history will end in a fast-approaching Singularity, in which computers become intelligent enough to build still-more-intelligent computers, in a feedback loop which will become transhuman.
In 1979, the World Climate Conference of the World Meteorological Organization issued a declaration that anthropogenic climate change is real, cementing the scientific consensus on global warming.