Guns do not explain youth and school violence because it is worldwide and doesn’t always involve guns. There are other theories than Gibson’s that attempt to explain school violence. There are theories that directly challenge Gibson, arguing that childhood aggression is not a playful thing that children grow out of. They argue that aggression is learned and therefore must be countered or suppressed in one way or another by adults. But if this is true, why are Americans and others experiencing even greater school violence as the attempts to suppress it are heightened?