Serious Constructive

See also sercon.

from Fancyclopedia 2 ca. 1959
There's a bit of serious constructiveness in every good little fan, but it's a label of questionable honor because of the nature of the beast. A do gooder or self-appointed censor, sometimes; he often believes that he has a Mission in Fandom, and labors for some Lofty Purpose or Worthy Line of Endeavor. He may be the fannish equivalent of the Rotarian or Chamber of Commerce booster; he likes to think fandom or science fiction will be the better for his work. And sometimes he is the organizer or builder who accomplishes an enduring work despite the scoffing of Voldesfen. Walt Willis represents his type of fans as Serious Constructive Insurgents, apparently indicating thereby adoption of the constructive features of the Insurgent Movement.

from Fancyclopedia 2 Supplement ca. 1960:
The contraction Sercon should be laid at the door of the Derelict Insurgents, of Toronto. And Willis explains the correct interpretation of the Serious Constructive Insurgent phase: the idea is that, since we are in fandom and devoting time to it, we should at least pretend that it is worthwhile, as a premise to our actions concerning it.