What is the theme in A Moon for the Misbegotten by Eugene O'Neill?

A Moon for the Misbegotten examines deception. The major point of deceit in the play is when Hogan lies to Josie about Jim breaking his promise. This is an intentional act of deception. There is nothing accidental about it. In order to achieve his goal, Hogan uses everything he knows about his daughter and manipulates things accordingly so she will react exactly how he wants her to react. His motives may be noble but does that make the deception valid?