The danger of a single story or discourse

First of all I LOVE TED talks but this one in particular by Chimamanda Adichie, had me thinking about discourse and the how the "stories" we are told inform how we look at the world and even the kinds of questions we ask and the basic assumptions we employ.

Of course, this isn't exactly about IR, but it still resonated with me. I thought I'd share.

If as the speaker says "a single story robs people of dignity" how can discourse analysis help us tell other parts of the "story"?