 Although appealing to a bargaining solution can give determinacy to a social contract, it does so at the cost of appealing to a controversial commensuration mechanism in the case of axiomatic bargaining or of moving to process approaches that must ultimately rely on the empirically contingent outcome of social and biological evolution. Although the importance of bargaining in the social contract has been moribund for some time, recent work is changing that (see Alexander 2007, Thrasher 2014, Thoma 2015, Muldoon 2017, Moehler 2018, Vanderschraaf 2018, Bruner 2020).