I think language in very rudiment form was used long before man. Even the "telling of lies" too. One group of primates (apes or monkey - I for get which was moving thru an open field eating some berries but an older member of the group could not keep up; so most of the berries were gone when he got to where the others had been eating; However according to the anthropologist recoding it all he was not dumb. He used the fact that their "language" had several different warning cries. One for an air born danger, like large bird of prey that might snatch a baby; a different one warning of snakes, and still a differnent one when the danger was an approaching lion or tiger, etc. There was no danger but the old guy let out a "lion approaches" cry and all the younger members of his group ran for the distant tree while he advance eating the berries they passed by. I think some of the smarter ape /monkeys "write" too, mainly by breaking down but not off small branches to mark their path - good for quick retreat, if invading another group's feeding area. Wars can and do develop between groups. Both group A and group B know that certain fruit bearing tree "belongs" to say group A, but if they can, group B will steal fruit. Also some fish can change the color of spots on their sides. I.e. a male can "say" to a female: "Hi - good looking, want to have some fun"