Meaning: The indicator measures the prevalence of relatively cool temperatures in each season combined with abundant fresh water resources throughout the year, on a country's historically most populated areas.
Source: Index construction based on geo-climate data from the Harvard Geography Project, as documented in the appendix to Welzel's (2013) Freedom Rising, online at www.cambirdge.org/welzel, pp. 105-112.
Scaling: Scores range from 0 for the hottest and driest countries to 1 for countries combining highly consistent precipitation with cold temperatures.