User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-95.112.225.227-20150909071814/@comment-27457157-20150912212303

it seems more likely that the fight between Michael and Lucifer would just be more contained, im sure they could destroy alot more than just earth if they wanted to, but neither did, Michael wanting paradise and Lucifer viewing earth as his fathers last masterpiece, and the Archangels are refered to as celestial beings of light, and if ya shine a flashlight on a dark area it is bright again, i think it was there differing natures from the darkness that really helped