explain Medea as a tragedy?

All Greek tragedies have choruses, who take on the roles of observers, narrators, commentators and critics. In the very structure of the play, they are the connecting links between events, people and situations. But in this play, with its all-woman chorus, dressed alike, speaking together, moving and acting together, they created a different aura apart from fulfilling their conventional functions. They became the conscience keepers of Medea, her alter ego, prompting her to go this way or that, cautioning her, applauding her. They also became the representatives for all the women of the world or a leit motif for the eternal woman. They did their job to perfection and held the structure of the play together.