Indeed, most of the time when we are listening to the noises people make or looking at the black marks on paper that stand for such noises, we are drawing upon the experiences of others in order to make up for what we ourselves have missed. Obviously the more an individual can make use of the nervous systems of others to supplement his own, the easier it is for him to survive. And, of course, the more individuals there are in a group cooperating by making helpful noises at each other, the better it is for all — within the limits, naturally, of the group's talents for social organization. [...] Societies, both animal and human, might almost be regarded as huge cooperative nervous system.

p. 11 - Language in Thought and Action (1949) - Cooperation