"Judith Butler's Theory of Gender Performativity, Explained"

This is another explanation of the idea. It seems that it needs constant re-iteration or re-exploration, - because maybe our current Gender debates are shifting ground so fast even as we wrestle with our identities in an identitarian era. That is, we keep needing to be told who we are. This is a careful exposition of Judith Butler's thinking and it's very serviceable, if you have a spare half-hour.