> Under general relativity, gravity isn't seen as a force but a consequence of curved space-time. But why does the presence of matter cause spacetime to curve?

> Under general relativity, gravity isn't seen as a force but a consequence of curved space-time. But why does the presence of matter cause spacetime to curve? If you want to argue that gravity isn't a force, I don't think it's enough to say "it's a consequence of curved spacetime". I think you have to answer the question of why it curves. I'm not aware of an answer to that question. If there isn't one, as I suspect, then I would say, there's your force of gravity: you're just describing it as acting on spacetime itself rather than on the objects in that spacetime.