Honestly there have been efforts to bring north korea back into the fold (in regards to keep fanning the flames)..see the Sunshine Policy see the Kaesong Indust

Honestly there have been efforts to bring north korea back into the fold (in regards to keep fanning the flames)..see the Sunshine Policy see the Kaesong Industrial Region see the Six-Party Talks. These have been largely ineffective and in some cases ended in North Korean military action (see Cheonan). It hasn't been all sanctions and war and bombing. It sometimes takes two to tango...