A policy of inclusion may, in certain circumstances, be justified but inclu
sion is not an inherently moral principle. On occasion, the practice of inc
lusion may clearly offend against the principles of fairness. It is crucial
ly important to distinguish between empirical arguments for inclusion and w
ould-be moral arguments. That having been done, it is not clear that there
are in general any compelling empirical arguments for a widespread policy o
f inclusion, and it is tolerably clear that inclusion is not morally incumb
ent upon us.