Polynesians, Maori, Aboriginees Australia, and New Zealand (in that order of preference). Maybe some of the civilizations of the Indies as well. Just look at how much area on the map is always just empty. I'm sick of so much of the world being empty space.
Take into account that the Polynesians conquered (literally, metaphorically) the Pacific Ocean. Its HUGE you know. Take into account the Maori, 500-700 years before Europeans, and exist strong today. They overturned notions of racial and technological superiority when they defeated English colonists time and time again. Civilization has a strong 'what if' theme running through it, the Aboriginees are probably the oldest 'civilization', What if they started building cities and conquering?