This linguistic hyperdiversity resulted from a number of factors: continuing waves of migration, the existence of numerous decentralised and generally self-sufficient communities, hostilities between people groups, with none able to dominate any of the others, and the difficult geography of Vanuatu that impeded inter- and intra-island travel and communication. The geological record also shows that a huge volcanic eruption occurred on Ambrym in CE, which would have devastated local populations and likely resulted in further population movements. Human cannibalism was widespread in some parts of Vanuatu.
This linguistic hyperdiversity resulted from a number of factors: continuing waves of migration, the existence of numerous decentralised and generally self-sufficient communities, hostilities between people groups, with none able to dominate any of the others, and the difficult geography of Vanuatu that impeded inter- and intra-island travel and communication. The geological record also shows that a huge volcanic eruption occurred on Ambrym in CE which would have devastated local populations and likely resulted in further population movements. Human cannibalism was widespread in some parts of Vanuatu.