text:  And then you have countries who can make a difference, who have great wealth or great power. For example, many years ago, it was the Gulf state of Qatar, also Saudi Arabia, oil giants who wanted to make a difference in conflicts around the world, who in the case of trying to free people taken hostage, they'd make available large sums of money as an incentive for the groups to give them up. Lise, how has the face of mediation changed over time?