the Greater Nomadic Council

Evolutionary Pressure

Monkeys and apes who are good at deceiving their peers also have the biggest brains relative to their body size. The finding backs the "Machiavellian intelligence" theory, which suggests the benefits of complex social skills fuelled the evolution of large primate brains.

If this doesn't count, I don't know what does. The best response to this is Warren Ellis's though: "I fucking told you people. The Filthy Monkey, It Plans."

UPDATE: Here's a more in-depth look at the evolutionary pressures leading to our large brains.