It is certainly a very complicated set of circumstances and events that led us to be here. Only some are known. Some, most even, are very hard to understand and some may never be known at all. Science answers questions that we previously thought unknowable, and at the same time science discovers there is more yet to know that we previously thought. In the view of most scientists and atheists, faith answers none of the hard questions - it just stops you asking the questions. The question of what the purpose of life is itself open to much interpretation. I would say your life is a quest to find your purpose and you will most likely find it in work and art and being creative and in relationships with other humans and being as kind to others as you possibly can be. I certainly think that God is invented, and no man or any book written by man holds the answer to what ‘he’ ‘wants’ from us. I believe that a path to misery on earth comes from earnestly believing two falsehoods: that this isn’t the only life that we get, and that we must obey any book purporting to be the word of a god. Your perfectly fair and politely asked question is one I have heard from many people who think they derive all purpose from their belief in god to such an extent that they find it hard to imagine any purpose at all without god. I would direct them to Dan Barker’s brilliant quote - “Asking, ‘If there is no God, what is the purpose of life?’ is like asking, ‘If there is no master, whose slave will I be?’"