 We might compare this line of thinking to Leibniz’s principle of sufficient reason (PSR), which states that for every entity that exists, there is an explanation or reason for its existence (Della Rocca 2010; Guigon 2015; Dasgupta 2016; and the separate entry on  principle of sufficient reason).  In the contemporary literature, we may compare (PSR) with the inheritance principle discussed in Schaffer (2016b) and Trogdon (2018b). An open question, although not one that we will pursue here, is whether emergentist infinitism is compatible with (PSR).