The damage and casualties caused must be proportionate to what would have happened without intervention. The third condition is public support. Usually, public support, 'something must be done', precedes government action. All governments need public support, particularly when there is a risk of casualties amongst their own, but the 'body-bag syndrome' has got out of hand. These conditions are not often met.
Foresight is required in order to plan ahead for future conflicts.
With respect to the Moluccas, he explained how a year ago Moluccan organisations in the Netherlands appealed to the Dutch government to intervene in the conflict there. They consider the Netherlands, the former colonial power, to have a special responsibility for the Moluccas, as many Moluccans were soldiers in the Dutch army fighting against independence for Indonesia. When the Netherlands relinquished Indonesia they were left exposed, and many went into exile in the Netherlands. Some, not all, of the Moluccan organisations were invited to meetings with government officials, and they were provided with resources to help run their organisations. Afterwards, the call for humanitarian intervention was no longer heard.