title: Unifying perspectives on cooperation under social viscosity: Comment on "Universal scaling for the dilemma strength in evolutionary games" by Z. Wang et al.
authors.affiliation: Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. Electronic address: cbauch@uwaterloo.ca.
authors.forename: Chris T
authors.initials: CT
authors.lastname: Bauch
mesh_terms: D000818:Animals; D005075:Biological Evolution; D005716:Game Theory; D006801:Humans