 Since the late 1980s, ST has been one of the central players in the philosophical, psychological, and neuroscientific discussions of mindreading. It has however been argued that the fortunes of ST have had a notable negative consequence: the expression “mental simulation” has come to be used broadly and in a variety of ways, making “Simulation Theory” a blanket term lumping together many distinct approaches to mindreading. Stephen Stich and Shaun Nichols (1997) already urged dropping it in favor of a finer-grained terminology. There is some merit to this. ST is in fact better conceived of as a family of theories rather than a single theory. All the members of the family agree on the thesis that mental simulation, rather than a body of knowledge about other minds, plays a central role in mindreading. However, different members of the family can differ from one another in significant respects.