One way, used surprisingly rarely as a weapon of diplomacy, would be to deny its political leaders and their families access to foreign bank accounts and overseas travel. Colombia's decision to freeze guerrilla bank accounts and confiscate their deposits seems to have been more effective than years of military engagement. If the warlords of Angola have no foreign bank accounts and, moreover, were deprived of their markets for diamonds and oil, their vested interest would be radically transformed. This is no time to despair of Angola. There are other methods besides traditional UN peace-keeping for edging the protagonists towards peace.
Peace making has to be a creative business.
We have to study war a little less and peace a little more. An opening at long last for nuclear disarmament. Perhaps there will be no major wars in the next century. The U.S. and North Korea could be heading for the nuclear abyss.