On the show I was watching about the moon it did say that when the moon was still molten and was a lot closer to Earth that the high tides instead of being 10 feet different were probably 10k feet higher, and that the drag from the moon significantly slowed the earth’s rotation. I don't really know how this applies to my question and your answer except maybe to show an extreme case, and I would like to ask if you think it is likely our planet could enter a vicious cycle? Could it enter a cycle where the polar caps melt raising the ocean level thus slowing the rotation of the planet making the days longer and hotter thus melting the polar caps more and more until there is no more ice?