Macbeth is one of the greatest plays ever written, but Shakespeare's depiction of Macbeth bears little resemblance to the truth. The real Macbeth lived in a time of constant battle between those Scots who followed the Celtic system of electing the King, and those who followed the English system of Inheriting the crown in the direct line of succession. Macbeth and Duncan were both grandsons of King Malcolm, but when the King named Duncan as his successor, it caused great resentment, resulting in a protracted war between the clans. When Duncan proved to be a weak and foolish King, the stage was set for a final battle that would come to define Scotland and its people for generations. In 'Macbeth, the last Celtic King', the fog of history is finally lifted, and the true Macbeth is revealed.