An awful lot of us white sf writers, when we run into issues and arguments about race, give various reasons for why we shouldn't, can't, or won't write about characters with racial or ethnic backgrounds other than generic white. (I've certainly told myself plenty of things along those lines, over the years.)
Mary Anne has now provided a gentle introduction, for white writers, to why we should and how we can include racially/ethnically diverse characters in our fiction. Good stuff.
And thanks again to Scalzi for providing Mary Anne with a high-profile platform for this pair of pieces.
PS: I again recommend reading M's piece in full before commenting.