How did consciousness evolve? A bit more about Mead's thesis that mind is fundamentally an intersubjective or social phenomenon.
Mead examines the failures of the individual-centric theory of mind to account for shared or common meaning. Whereas, for the social-communicative theory of mind, this is a fait accompli.
If, as Wundt does, you presuppose the existence of mind at the start, as explaining or making possible the social process of experience, then the origin of minds and the interaction among minds become mysteries. But if, on the other hand, you regard the social process of experience as prior (in a rudimentary form) to the existence of mind and explain the origin of minds in terms of the interaction among individuals within that process, then not only the origin of minds, but also the interaction among minds (which is thus seen to be internal to their very nature and presupposed by their existence or development at all) cease to seem mysterious or miraculous. Mind arises through communication by a conversation of gestures in a social process or context of experience-not communication through mind...
From the individual perspective, this involves "taking the attitude of the other," a method that is likewise central to the works of Sartre:
As we shall see, the same procedure which is responsible for the genesis and existence of mind or consciousness - namely, the taking of the attitude of the other toward one's self, or toward one's own behaviour - also necessarily involves the genesis and existence at the same time of significant symbols, or significant gestures
Essentially it is a 'symbolic behaviouristic' approach:
Gestures become significant symbols when they implicitly arouse in an individual making them the same responses which they explicitly arouse, or are supposed to arouse, in other individuals, the individuals to whom they are addressed; and in all conversations of gestures within the social process, whether external (between different individuals) or internal (between a given individual and himself), the individual's consciousness of the content and flow of meaning involved depends on his thus taking the attitude of the other toward his own gestures.