  We schematically review some of the main steps in the study of the Horizontal
Branch Morphology in Galactic Globular Clusters. Since the first realization of
the existence of the so-called Second Parameter Problem (2nd-P) up to now, one
could perhaps see a sort of circular path. Actually, many candidate 2nd-P's
were proposed during the early '70s, age has been the top-scored 2nd-P during
the late '80s, and we are now back to even more candidates, including also
possible intriguing combinations of some of them.
