Nations nearly always find their pride in their origins - a migration, a revolution, a war of independence. New Zealand, possibly uniquely in the world, can find it in a treaty. A treaty of equals.
Maori were far more populous, and in a sense powerful, than the Pakeha of 1840. They were so dominant they did not think of themselves as Maori so much as hapu and iwi whose country was rapidly changing.
For 40 or 50 years, a trickle of Europeans had been coming to hunt, trade, preach their religion and ask for land in return for their manufactured goods, such as guns.
Guns had turned tribal conflicts into devastating disruption in the 1820s. The Auckland isthmus, previously full of villages and crops, was abandoned in the face of Ngapuhi raids and by 1840 it had not long been reoccupied by a subtribe of Ngati Whatua whose chief sent a delegation to Waitangi.
Apihai te Kawau sent an invitation to the Governor to establish his capital on the Waitemata. He did it almost certainly for the same reason that so many chiefs who went to Waitangi signed the treaty offered to them this day. A European presence was an investment. It promised trade, education, a higher material living standard, modern law and peace.