The introduction of what food in Maori New Zealand in about AD 1400 contributed to agricultural surpluses, overpopulation, and warlike competition?

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The introduction of the sweet potato (kumara) to Maori New Zealand around AD 1400 significantly impacted their agricultural practices. It led to agricultural surpluses, which in turn contributed to population growth and increased competition for resources, often resulting in more warlike societies. Sweet potatoes were more productive and could be stored for longer periods than the traditional crops, making them a valuable resource.

The Introduction of What Food in Maori New Zealand in About