Following the last Ice Age, bands of ancient tribal hunter-gatherers known as the Habiru set up in the land of Southern Canissia, where-- mostly isolated by high mountains that separated them from their neighbors-- they managed to expand more or less peaceably. The climate lended itself well to agriculture, which became increasingly important as the larger game animals were hunted down to extinction in some cases (Mammoths) and near-extinction in other cases (Deer).