I watched one of the LOOKING GLASS videos that was posted here. I'm not sure what I believe about that, BUT it did mention in the video that even IF people have the ability to time travel there is a GOD and Angels that step in, and only let so much bad happen. I do believe in God and Angels, and it made sense to me. There are HIGHER POWERS and humans only have so much control. That's why. You don't have to agree, and I am not looking for any arguments.