Most of the sci-fi (and much fantasy) that I enjoy reading is heavily laden with political concepts: power struggles, revolution, exploration of alternative political systems. For example, Kim Stanley Robinson's Mars trilogy and Orwell's Nineteen Eighty-Four. Often there's also a lot of related concepts mixed, like gender issues (Ursula Le Guin), or ethics (lots of Asimov's stuff), or political intrigue (e.g. Wurts and Feist's Empire trilogy).
Is political sci-fi, or socio-political sci-fi (or fantasy) a recognised genre anywhere? I never see it in bookshops, but it seems like it could be a really useful classification.