  The problem of reconciling general relativity and quantum theory has
fascinated and bedeviled physicists for more than 70 years. Despite recent
progress in string theory and loop quantum gravity, a complete solution remains
out of reach. I review the status of the continuing effort to quantize gravity,
emphasizing the underlying conceptual issues and the various attempts to come
to grips with them.

General Relativity and Quantum Cosmology;High Energy Physics - Theory