Interesting article on the subject of vengeance, particularly among the tribes and clans of the New Guinea Highlands.

One minor point came to mind:

In these accounts, Dani public battles emerged as somewhat ritualized, announced in advance by the issuance of challenges, confined to daylight hours, and abandoned in case of rain.

Has anyone introduced them to the game of cricket? With warrior spirit and skills, and already possessing an appreciation for some of the rules, they could make excellent players.