 Comparative philosophy brings together philosophical traditions that have developed in relative isolation from one another and that are defined quite broadly along cultural and regional lines – Chinese versus Western, for example. Several main issues about the commensurability of philosophical traditions make up the subject matter of comparative philosophy. One issue is methodological commensurability – whether and how comparisons between different philosophical traditions, in this case the Chinese and Western, are to be conducted. Views run the gamut from those holding that meaningful comparisons cannot be conducted at all to those holding that the content of traditions must largely be the same. Other issues concerning commensurability concern specific subject matters of traditions. The issue of metaphysical and epistemological commensurability involves the comparison of traditions on their conceptions of the real and their modes of inquiry and justification. Ethical commensurability involves the comparison of these traditions on the matters of how people ought to live their lives, whether both traditions have moralities and if so how similar and dissimilar they are. The separation between these main issues is somewhat artificial, given that a discussion of methodological commensurability will inevitably involve the comparison of traditions on metaphysical, epistemological, and ethical matters. There is some heuristic value, however, in beginning with a general discussion of views on methodological commensurability with a brief illustration of how these views might be applied to some Chinese/Western comparisons. Subsequent sections will address Chinese-Western comparisons in metaphysics, epistemology, and ethics that have assumed special prominence in the literature. 