Although at first glance Medea appears to be the protagonist at a closer look Jason better fits this role. Jason breaks oath to the Gods by promising fidelity to Medea but then not keeping his promise. He breaks his fidelity to Medea by leaving her for the Princess. In those days a man was allowed to "divorce" his wife by returning her to her father along with the dowry which was given at the time of the marriage. The woman is then allowed to be given away again to marry and the man does as he pleases. However, Jason simply leaves his wife but does not official rid himself of her. Throughout the text Medea and the Nurse still refer to Jason as her husband although they are not technically together. This not only upsets Medea and drives her to a crazed state of being but also the social "norm" of the times which in turn upsets the Gods. Jason is very self-centered and although he tells Medea he only left her and the children to secure their future. It seems as if he does what he needs to better him or the situation. He is very manipulative to people in order to get what he wants. However, he is very naïve to the fact of Medea's true power and craziness. Other characters, such as Creon, believe her to be utterly crazy and a threat to the Royal Family and therefore exile her. Creon even refers to Medea as a "cunning woman" and recognizes her true potential, while Jason sees her to be showing her emotions "as a woman should." In the end Jason realizes Medea's sincere disturbance and recognizes her as a powerful threat and undertaker.
Jason’s tragic flaw is is willingness to give in to his wants and fantasies.