Over a few million years the concept of communication has evolved to such a specific state that we now posses the ability to intelligently speak and interpret thoughts and feelings as well as manipulate the thoughts and feelings of others through words.
Language is a service possessed only by human beings.
Its purpose however, that of communication, is an activity in which all species engage. In some way, all creatures communicate, not by words or facial expressions, but in their own way these creatures convey their desires and emotions to other members of their species. The type of communication facilitated is species specific, such as language to humans and sonar to dolphins. Evolutions do not result out of nothing, therefore human language had to evolve from some concept of communication. The Continuity Paradox explores the possibilities of the origin of language.