All hail Ursula K LeGuin, one of this (and last) century’s foremost writers. If you haven’t read any of her work yet, you should!
LeGuin’s (later*) work tells the truth with clever lies that strip western social norms to their roots in order to better shake the tree. You’ll never look at the world in the same way.
(*Interestingly enough LeGuin started as a fairly conservative Sci Fi writer.)
Then, when you’ve cut your teeth on that, you can move on to Octavia Butler . . .