String theory

First and foremost, I would have to say that String Theory is a very complicated thing for me. I understand the concept of it, but there are so many question that I asked myself when I think about string theory: e.g. Why is the universe have to do with " strings" connecting to them?
Some of my feelings when I finished watching this video about string theory is that I now firmly believe that there is god. Lots of people had been questioning me " why did you believe in god if he does not exist?" I replied " well you can't proof that he doesn't exist since you don't have any evidence of him doesn't exist, right?". God, or some kind of energy that governs the universe, exist. If there is no god, then why does the universe came out to be this way? and the asteroid that hit earth billions years ago that made the volcanoes erupted and therefore created a chain of effects resulting life was a coincident?

Another question I asked myself was that why we can do so many good and amazingly well things about the universe, but why we couldn't solve global warming? or solving issues such as the problems between China and Taiwan? We humans have the potential to do good things, but some how we humans have " let it be wasted" by our own desire and selfishness. If we humans are capable of putting desires and selfishness aside, we WILL succeed and will be able to discover more and more things we might not even thought about it.