Strange quotes appear in Time: “Peaks of social disturbance such as rebellions, revolutions, and political reforms followed every decline of temperature"; “The number of wars increased by 41% in the Cold Phase”

Climate Change Caused Crises Half A Millennium Ago, Too - Ecocentric - TIME.com

Take for example the cooling that occurred from 1560 to 1660—a century within the 300-year era known as the Little Ice Age: plants couldn't grow as much or for as long, so grain prices soared, famine broke out, and nutrition sank. Poor diet means poor growth even for survivors, and the late 16th century saw a decline in average human body height by 0.8 inches. As temperatures rose again after 1650, human height crawled back up too. Before it did, however, sky-high grain prices and accompanying real wage declines brought social problems more pressing than height.

“Peaks of social disturbance such as rebellions, revolutions, and political reforms followed every decline of temperature, with a one- to 15-year time lag,” the scientists wrote, adding that many such disturbances escalated into armed conflicts. “The number of wars increased by 41% in the Cold Phase.”