Agents are born onto the Sugarscape with a vision, a metabolism, a speed, and other genetic attributes. Every time an agent moves, it burns sugar at an amount equal to its metabolic rate.
Agents die if and when they burn up all their sugar.
A remarkable range of social phenomena emerge. For example, when seasons are introduced, migration and hibernation can be observed. Agents are accumulating sugar at all times, so there is always a distribution of wealth. Population growth forces each tribe to disperse into the sugar lowlands between the mountains. There, the two tribes interact, engaging in combat and competing for cultural dominance, to produce complex social histories with violent expansionist phases, peaceful periods, and so on.