A few particularly good articles:
What Does Story Do? -- Why we read fiction, particularly speculative fiction.
6 More Things I Could do Without in Fantastic Literature & I don’t plan to use except to make fun of and its companion article, 11 Things in Fantasy/SF That I Don't Promise Not to Use (or Keep Using) in My Writing -- The bit about stew in the second one are particularly good.
If you read science fiction, check it out. If you write science fiction, check it out. If you don't read science fiction, you're missing out.