God's invention or the invention of God?

I still remember a discussion with a very good Indian friend of mine....sometime in 2000 I think...we started talking about girls, money, food, sport, career, love and finally ended up talking about something mystic.....about God and religion...we talked about how the concept of God could have set in...some excerpts from that discussion....it could be that when man is faced in front of a danger or uncertainty so big and so severe that its beyond his control..he seeks help and shelter from an entity much much larger and bigger than him...which would be able to provide salvation from the imminent danger....that is how people started worshipping gigantic mountains, turbulent oceans, violent winds, flashening thunderbolts, or even a huge tree or a big piece of rock....all of which have been items of worship and have been labelled 'such and such' God at some point of time....as man was vulnerable to the forces of nature....man felt so small in front of these items that they knelt down and asked for protection and mercy. Over a period of time, we saw the rise of some 'social scientists'....now what are social scientists? We have scientists who have invented say electricity, radio, television etc. we have theories from Newton, from Einstein and from Thomas Edison....similarly a few men had thought deeply about the indiscipline and chaos in personal and social lives....and they have tried to come up with a formula..or a set of rules...to install order and peace in both personal and social lives....in the societies they used to live in....so they devised the sets of rules and procedures which took the form of religion over a period of centuries....but these wise men knew that anything man made like this would be a subject to ridicule or even destruction by other people....so the divine presence of a super power was essential to justify and validate the rules...voila came the notion of God...the almighty......the supreme....anyone who doubts His teachings...His directions....are infidels....and are wrong....was the impression. But if we look at today's world....we see that religion was probably needed once upon a time to establish a common platform among people...so they could share common personal, social and spiritual values...but no more....now religion has become secondary as a mean to install commonality among people....because we have concepts of country and culture as a stronger element to build bonds among people. So...after all this easy explanation of how religion was invented.....where does God go? should we all be atheists? should all religious teachings be banned? Well...in my opinion....when I close my eyes...I can very easily speak to My God...and religious values are ofcourse important....as no religion tells to steal, to tell lies, to kill....so I guess now is the time to focus more on the end results of religions....rather than looking at the means of it.