  A discursive, non-technical, analysis is made of some of the basic issues
that arise in almost any approach to quantum gravity, and of how these issues
stand in relation to recent developments in the field. Specific topics include
the applicability of the conceptual and mathematical structures of both
classical general relativity and standard quantum theory. This discussion is
preceded by a short history of the last twenty-five years of research in
quantum gravity, and concludes with speculations on what a future theory might
look like.
