Methinks Norwell is the only person in the country who has never heard of "Reagan Democrats".
An explanation stolen from John J. Pitney Jr., Associate professor of government at Claremont McKenna College & author of The Art of Political Warfare. This is the Reagan Republican definition I am accustomed to seeing.
Now as for Reagan implementing a social agenda, perhaps I misunderstood, but I thought he:
Attempted to appoint judges who'd overturn Roe V.Wade, such as James Buckley and Robert Bork
Endorsed Constitutional Ammendments to protect the flag and allow prayer in school
Instituted a We Ask-Don't Belong-Don't Join policy regarding homosexuals in the military by executive order shortly after taking the presidency
Fired homosexual aides while Governor in California
Ended sex-integrated basic training (at least in the Army) begun under the Carter Administration
Vetoed bills publicly funding abortion
Ended all abortions at US Military Facilities
Campaigned vigorously on behalf of candidates like Paul Laxalt, Jesse Helms and Malcolm Wallop. I'd say this is at least a fairly decent effort at implementing social conservatism and the fact he had varying degrees of success does not mitigate the fact he made an honest attempt to do it.
Now, if you want somebody who speaks out of both sides of his mouth, look at GWB as regards enforcing immigration laws.