Climate Change and the Human Condition
by Sherwood, Keith, and Craig Idso
CO2 Science, Volume 11, Number 17 [here]
In the introduction to their illuminating paper, the authors say they previously studied “a long span of Chinese history and found that the number of war outbreaks and population collapses in China is significantly correlated with Northern Hemisphere temperature variations and that all of the periods of nationwide unrest, population collapse, and drastic change occurred in the cold phases of this period.” In their current study, they write that they “extend the earlier study to the global and continental levels between AD 1400 and AD 1900.” This they do by using high-resolution paleoclimate data to explore “at a macroscale” the effects of climate change on the outbreak of war and population decline in the pre-industrial era as discerned by analyses of historical socioeconomic and demographic data.
In describing their findings, the five scientists say their newest analyses, like their earlier ones, show that “cooling impeded agricultural production, which brought about a series of serious social problems, including price inflation, then successively war outbreak, famine, and population decline.” And they suggest, as they put it, that “worldwide and synchronistic war-peace, population, and price cycles in recent centuries have been driven mainly by long-term climate change,” wherein warm periods were supportive of good times and cooling led to bad times, some of which (in our opinion) could arguably be described as a descent into hell. … [more]