> Grains were first domesticated about 10,000 years ago, during the "Holocene climatic optimum", when temperatures were significantly higher than "pre-industri

> Grains were first domesticated about 10,000 years ago, during the "Holocene climatic optimum", when temperatures were significantly higher than "pre-industrial" times. Your "significantly higher" 10,000 years ago is already less than what the global warming already produced, and even less less then what the global warming will produce in the future even if all countries do what they promised to do: https://en.wikipedia.org/wiki/Holocene_climatic_optimum#/media/File:Holocene_Temperature_Variations.png https://en.wikipedia.org/wiki/Holocene_climatic_optimum#/med... Global temperature is now already higher than at any time in the Holocene and thus the entire history of human civilization. The paper: "Evolution of global temperature over the past two million years" defines "present" temperature not as what we measure today, but as an average of the last 10000 (10k, 10 thousand) years, and the temperatures were higher than that average only 100000 (100k hundred thousand) years ago, but only one degree. But compared to the last 10k years average, today we're already close to one degree above it. And if one adds up all the national pledges made in Paris to curb emissions, they would put the world on track to warm around 3 degrees Celsius or more (i.e. 2 degrees above the average of even 100k years ago). That will be more than what happened in the last 2 million years, if you look at the Figure 3.