Religion no longer matters on any other scale than the individual.
Sure, there are billions of people actively involved in church, temple, etc. And billions more that practice praying or confessing or Good Fridays or whatever.
But who do they do it for?
A society?- Does the collective believe that if they do not follow their religion that God (or whatever holds the power) will punish them as a whole? With droughts or disease or other such things? And if they do follow God's will that they will be 'blessed' with things that help the community? (rain for crops, good health, etc)?
No, no one living in the modern world practices religion for such reasons ANYMORE. These are old ways. Ways that are no longer in practice.
So what do people practice religion for now?
They think if they live the "holier than thou" lifestyle, they will be blessed with their individual desires. They pray for riches, not righteousness. They pray for a few more years of life, not because they want to do something worthwhile for anyone-but because they want to cling to THEIR OWN PERSONAL desires just a bit longer.
To ask if we need a replacement God is to ask if we need a replacement excuse. Our God didn't give us the perfect paradise we prayed for... our God no longer means anything to us.
We live in a society where people are atheists, "passive followers" (yeah I believe in God, but I don't go to church or any of that shit), or the "personally devout," (I believe in God, I go to church, I don't sin/I repent because I want to save my ass from Hell).
So, to those that still cling to the idea that the world needs religion: I say:
Look around, and see how little merit religion has in the world today. It has a very small part of our backbones clenched (Jihad, etc). But when you go to a restaurant, do you see any of the overweight families with too many greedy kids say grace before they stuff their snouts? When you walk by a church do you get the feeling of being mystified by what it (used to) represent? Do you pray for the good of your society? Do you repent your sins? Do you look beyond the individual in your beliefs?
The world no longer cares about being righteous, their priority is being rich.
The world no longer cares if they go to Hell, because the idea that we can be punished so severely for not living devout does not fit the happy little thoughts of theirs.
The world no longer sees their sins as sins- "I only had sex with her ONCE."
The world is full of excuses to justify their shunning of religion.
It doesn't matter though. What's here in front of us is what is at hand. We don't live in a religious mind-set anymore. Those people are long gone. So let us take that into account as we set off to war, as we spend thousands frivolously, as we fuck our neighbors wives...
If the fear of God no longer holds us back, what will?