| Those civilisational collapses were in response to changes in climate far less than what we're now facing. Graphical representation of global temperatures, where the relevant period for human civilisations is roughly the past 10,000 (10kyr): <https://scx2.b-cdn.net/gfx/news/hires/2020/highfidelity.jpg> Note too that the timescale is discontinous, with the scale expanding at 30,000 years ago and in 1850 (173 years ago). The span to the right of 1850 shows 350 years, the span to the left of 1850 shows ~30,000 years, before expanding again to show 65 million years of climate history, back to the extinction of the (non-avian) dinosaurs. Chart is "Average Global Surface Temperature: Difference to 1961--1990 (°C)". Citation is IODP: International Ocean Discovery Program. Appearing in context here: "High-fidelity record of Earth's climate history puts current changes in context" by University of California - Santa Cruz. September 10, 2020. <https://phys.org/news/2020-09-high-fidelity-earth-climate-hi...> |
