chemistry background (and has published a number of physical chemistry studies investigating the compatibility of the RNA world hypothesis with a hydrothermal vent origin of life), but has also published extensively in the social sciences area, for example applying evolutionary concepts to other 'life-like' systems, such as social insect colonies and human civilizations.
Fig 8 is very reminiscent of Fig 1 of Wu and Higgs (2009) J Mol Evol 69:541-554 and Fig 1 of Wu and Higgs (2011) Astrobiology 11:895-906.