Should countries give concessions to states that make threats?

Axis: concessions can buy peace ... concessions reward and invite threats

Hank

date	change	position	video
2013-04-05	new	Hank: North Korea's tantrums have won concessions; sometimes giving in may be better than a war, but if you keep giving them what they want they have no reason to stop.	North Korea: Explained 00:03:23