 It suggests an explanation of human origins, and also of human properties (from speech to political/economic/religious behavior).According to his theory, the cost to an enforcer of coercing a cheating individual into a cooperative effort, known as the free-rider problem, was lowered when a precursor species to modern humans developed a way to threaten adult conspecifics from a distance by evolving the ability to throw projectiles that can injure the cheater.This reduced the personal risk to the enforcers as formulated by Lanchester's Square Law when they gang up on a cheater.