Macbeth and politics

Macbeth: If we should fail?

Lady: But screw your courage to the sticking place and we'll not fail.

So what does this really mean? In my view, Lady Macbeth is saying we don't have to be merely subject to the stars. We are not victims of them unless we choose to be. So why does Macbeth take a fatalisitic point of view? Perhaps like us today he wonders about evil. He is struggling with doing evil for his own gain. Isn't there always a justification for evil? Don't all the prisoners in Florence, CO claim to be innocent? They've all been framed. Even Ted Kaczynski, the unibomber had a reason. Right?

Macbeth has moral sensitivity. He has the problem of a guilty ambition that preys on his conscience. Sounds like politics today, and the outcome is the same too. However, like Macbeth our politicians today ultimately see an end to their moral perturbation. They have hardness of heart. The murder of Mcduff's child is a further outrage, but nothing seems to matter anymore. Like liberal politics today, nothing seems to matter to them anymore.