Negotiation encourages moderation  In every terrorist movement there are different factions and disagreements about how best to achieve their collective aims, and often terrorist groups have either direct or indirect ties with political parties with whom they share the same goals. It is clearly then in the interest of the state to strengthen the more acceptable parts of the movement whether can seriously talk to. The only way to strengthen the moderates is to negotiate. This then makes their path to a solution the more credible course for the movement as a whole to take. To demonstrate a negative example the United States and Israel were unwilling to negotiate with moderates within the PLO for fifteen years during which time not only was there a lot more bloodshed but much more radical groups formed on the Palestinian side making negotiations much more complicated in the long run as there would be multiple groups who would need to sign up to a final peace treaty. [1]  [1] Chamberlin, Paul Thomas, ‘When It Pays to Talk to Terrorists’, The New York Times, 3 September 2012,