I'm still trying to sort out what I think of this approach as it relates to fiction writing, commercial fiction writing in particular. There is a wave of conversation in the commercial fiction world about intentionally creating unstructured characters to provide the reader with a more satisfying experience. Mamet's approach would support the concept of reducing character interiority and backstory. But in doing so, does a writer risk creating flat, underdeveloped characters and delivering a flat underdeveloped story?
If you're looking for something to stir your thinking, I suggest this little book. It can be read in a couple hours. Perfect for a plane ride or rainy afternoon.
**Yeah, I think I just made that term "unstructured character" up.