[ghalleen]

The question should not be whether you have a moral duty to retreat, because you don't, period. You have a moral duty to protect yourself and your loved ones in the best manner possible.

Now, you have to use wisdom and common sense to determine how you best protect yourself and them. It simply makes more sense, a lot of the time, to retreat. Each situation is unique, and it's impossible to predict whether or not it is the better choice to fight, retreat, or hide, or something else entirely.