 A second strategy, which we can call the monist strategy, is available to supersubstantivalists (those who hold that each material object is identical to a region). They can say that what it is for an entity x to be a part of an entity y is: (i) for x and y both to be material objects, i.e., both to be among those privileged regions that count as material objects, and (ii) for x to be a subregion of y. (Wake 2011 and Nolan 2014 develop this strategy.) One virtue of the monist strategy is that, unlike the locationist strategy, it does not need to invoke a fundamental location relation. But it is vulnerable to versions of many of the same objections, including those concerning the proper treatment of subregionhood, the objection from topic-neutrality of parthood, and the objection from interpenetration.