  We review the known ways of incorporating and breaking symmetries in a
renormalizable way. We summarize the various grand unified theories based on
$SU_5, SO_{10}$, and $E_6$ as family enlargement groups. An $SU_5$ model with
an $SU_2$ gauged family group is presented as an illustration. In it, the
e-family (i.e., e,u and d) is classically massless and acquires calculable mass
corrections. The family group is broken by the same agent that does the
superstrong breaking. Finally, we sketch a way of unifying the family group
with $SU_5$ into $SU_8$.
