 In the biological sciences especially, one rarely hears talk of laws; rather, it is models that are discussed. We can begin by considering a simple model used in conservation biology, a metapopulation model (Hanski &amp; Gilpin 1997; Levins 1970). A metapopulation is a population of populations that are subdivided spatially, but are causally connected through migration. Let \(P\) be the proportion of patches occupied by a species, \(c\) is the rate of patch colonization, and \(e\) is the rate of patch extinction. Thus, the instantaneous rate of change in the proportion of occupied patches is the proportion of patches colonized minus those in which extinctions occur. Mathematically, we have,