I don't know because I was not there to see how it all happened, and neither was anyone else who is alive today. I cannot say with complete certainty that Gods and spirits do not exist but I can say with confidence that it is highly unlikely. You cannot prove that souls or your god exist anymore than I can prove that unicorns or the flying spahghetti monster exists. Why do you accept a belief system based on myth and superstition and deny others? Why are you not a Wiccan, Buddist, Hindu, Christian, or Scientologist? I believe that attributing invisible supernatural causes to aspects/occurences of the natural world is intellectually lazy and dishonest.
Response: The existence of Allah(God) can easily be proven. About as easy as proven that 2+2 is 4. Yet I, nor anyone for that matter, is responsible for the clear denial of atheists to the fact. If you're interested of proof that there is a God, perhaps you can post on similar threads on the topic or create a new one, and I 'll be happy to address you there.