Social problems may fruitfully be looked at as constructed phenomena,
that is, what constitutes a problem is the concern that segments of th
e public feel about a given condition. From the constructionist perspe
ctive, that concern need not bear a close relationship with the concre
te harm or damage that the condition poses or causes. At times, substa
ntial numbers of the members of societies are subject to intense feeli
ngs of concern about a given threat which a sober assessment of the ev
idence suggests is either nonexistent or considerably less than would
be expected from the concrete harm posed by the threat. Such over-heat
ed periods of intense concern are typically short-lived. In such perio
ds, which sociologists refer to as ''moral panics,'' the agents respon
sible for the threat-''folk devils''-are stereotyped and classified as
deviants. What accounts for these outbreaks or episodes of moral pani
cs? Three theories have been proposed: grassroots, elite-engineered, a
nd interest group theories. Moral panics are unlike fads; though both
tend to be relatively short-lived, moral panics always leave an inform
al, and often an institutional, legacy.