One of the few (in fact probably the only) reasonable argument for the existence of a God revolves around the creation of the universe. However this is a far weaker argument than it first seems. After all God is not necessary for creation and even if he was, it still leaves numerous other problems with his/its existence.
Religious people often ask Atheists, if there is no God then where did the universe come from? How can something come from nothing? They look at the world and proclaim it is not possible for everything on Earth to come about naturally, it must have a designer.
Let me answer this question with a question. If God created the universe then what created God? If nothing can come from nothing, where did God come from? Suddenly we are back at square one. This is the major flaw in the religious argument that is often overlooked and causing the debate to descend into chicken and egg style endlessness.
However, even if God did create the universe there are still other problems. For example, God may no longer be around. Creating the universe would prove God existed at one point in time but doesn’t prove he still exists. He could have died, after all 14 billion years is a long time. Creating the universe does not prove God hears or answers prays, that Jesus is his son, that a word of the Bible is true, that God even knows humans exist. God could have created the universe and that would still not mean a word of Christianity (or any other religion) is true.
There is another overlooked problem. Why did God create the universe? No religion I know of can come up with a reason. If we humans are the centre of the universe (as vain and arrogant as that idea is) then why are there trillions of other planets? If God created the universe for us then the other planets are unnecessary so why are they there? Why did he wait billions of years before the Earth was formed and humans evolved? Did God create us just to worship him? That makes God out to be an attention seeking vainglorious thing that I wouldn’t be that comfortable worshipping.
Religious people argue that the universe couldn’t possibly come from nothing. Why not? Every book must have a first page, everything must have a beginning, before which it was nothing. I don’t see why the universe would be any different. There is no such thing as eternity (which is why I don’t believe the claims about Heaven and Hell), everything ends. This isn’t a particularly strange or scary thought; rather it’s a fact of life.
Regarding life on Earth, it is true that the odds of this happening are tiny. Let’s say there is a one-in-a-trillion chance that a planet like Earth could form with just the right conditions for life. Well there are 3 trillion planets in the universe, which means there are 3 Earths. So it is possible for life on Earth to form naturally and unaided, this is even more plausible when you consider how small Earth is compared to the rest of the universe. Just as it seems strange that something as complicated as a tree could form naturally without the help of a designer, so too did the universe.
Another flaw in the religious argument is that it is not in any way supported by either the Bible or Church teachings. This leads me to conclude that whoever wrote the Bible had no idea how the universe was formed and so made up the absurd story in Genesis. In fact the foundation of what we know about the universe is based on studies by people who were persecuted by the Church. The Church knew that if views about the universe that contracted its teachings were spread people would lose faith in the Church and even God.
Some religious people respond to this problem by cheating. They make up rules that say God doesn’t have a beginning or that he is that creator of the universe and therefore not subject to its laws. I have no idea what basis they have for claiming this and it is essentially moving the goalposts to win an argument. This argument is that everything has a cause except God, to which you could reply that maybe everything has a cause except the universe. The God of the Bible is depicted in almost human terms. He has a gender, a son, he walks, talks, displays emotions like love and anger. None of which are what you would expect from a thing beyond the limits of space, time and the laws of the universe. The other answer is to quote the bible which is as useless as it is daft.
So religious claims that God created the universe are not only flawed but they create more problems than they solve.
Stephen Hawkins believes there is no need for a God to create the universe, http://www.guardian.co.uk/science/2010/sep/02/stephen-hawking-big-bang-creator
An excellent site for a further explanation of the non-religious argument is http://www.vexen.co.uk/religion/universe.html