↑Schweizer, Karl W. (17 November 2022). "The Opinion of Mankind: Sociability and the Theory of the State from Hobbes to Smith: by Paul Sagar, Princeton, NJ, Princeton University Press, 2018, 280 pp., $45.00/£37.95 (cloth)". The European Legacy. 27 (7–8): 862–864. doi:10.1080/10848770.2021.1985241. ISSN1084-8770.
↑Hanley, Ryan P. (July 2019). "Paul Sagar: The Opinion of Mankind: Sociability and the Theory of the State from Hobbes to Smith. (Princeton: Princeton University Press, 2018. Pp. xii, 248.)". The Review of Politics. 81 (3): 527–529. doi:10.1017/S0034670519000093. ISSN0034-6705.