“…This discipline studied societal collapse conceptualizing societies as complex systems, both as only social systems and as socioecological systems. One more prominent example of the former conceptualization in relation to societal collapse is the work of Peter Turchin (e.g., Turchin, 2003 and colleagues (e.g., Turchin & Nefedov, 2009;Currie et al, 2018;Turchin et al, 2018;. His approach is the so-called historical dynamics or cliodynamics, essentially a mathematical modeling of social processes applied to historical events, in a manner echoing the cyclical theories of Toynbee (1946Toynbee ( , 1957 and Sorokin (1937), especially considering how they both presented cultures as systems (von Bertalanffy, 1974) and wrote universal histories (Joll, 1985).…”