One question that has occurred tio me about the history of animal domesticates is why water buffalo and banteng never reached New Guinea.
If we analogise with what Diamond says, any New Guinean people who could have acquired water buffalo and/or banteng in terms of labour needed to produce food and potentially in diet through their milk.
Would you think the problem was:
- that the New Guinea highlands were too cold for water buffalo or banteng?
- that water buffalo and banteng were domesticated too late to be used by migrating Austronesians?
- that water buffalo and banteng were too hard to carry on craft then available?