  In recent years a fashion has grown up to ascribe great importance to
``quantum critical points'' at T=0, at the boundary between the basins of
attraction to the stable fixed points of ordered ground states. I argue that
more physical significance in connecting microscopic interactions with observed
phenomena lies in the common phenomenon of partially ordered ``liquid'' states
at higher temperatures, unstable phases which define the relevant degrees of
freedom and may order in many different ways as the temperature is further
lowered.
