  After a brief reminscence about work with K. Sato 25 years ago on the
monopole problem and inflation, a discussion is given of the black hole
information paradox. It is argued that, quite generally, it should be
anticipated that the states behind a horizon should be correlated with states
outside the horizon, and that this quantum mechanical entanglement is the key
to understanding unitarity in this context. This should be equally true of
cosmologies with horizons, such as de Sitter space, or of eternal black holes,
or of black holes formed by gravitational collapse.
