I hesitate to make posts like this these days having discovered at Eastercon that anyone who tries to defend the literary quality of speculative fiction tends to get dismissed as a froth-at-the-mouth fanboy bent on keeping SF in a separatist ghetto where only adventure stories matter. If that seems odd to you, try reading this, which might explain where the idea comes from.
Having said that, James Purdon provides an interesting a very respectful look at the forthcoming British Library exhibition in today’s Observer.
Also Matt Cheney posts some very interesting quotes about the politics of conformance and transgression. They are not about SF per se, but they provide a useful way of seeing what the whole “not one of us” thing is about.