 What are we to make of this variety of species concepts? Monists believe that an aim of biological taxonomy is to identify the single correct species concept. Perhaps that concept is among the species concepts currently proposed and we need to determine which concept is the right one. Or perhaps we have not yet found the correct species concept and we need to wait for further progress in biology. Pluralists take a different stance. They do not believe that there is a single correct species concept. Biology, they argue, contains a number of legitimate species concepts. Pluralists believe that the monist’s goal of a single correct species concept should be abandoned.