Let's stop kidding ourselves that Greek debt is the Euro's key problem. With Greece gone, who's next ?
Without cultural indoctrination, all of us would be atheists. Or, more specifically, while many may dream up their own gods as did our ancestors, they would certainly not be ‘Christian’ or ‘Jewish’ or ‘Muslim’ or any other established religion. That’s because, without the texts and churches and familial instruction, there are no independent evidences that any specific religion is true. Outside of the Bible, how would one hear of Jesus? The same goes for every established religion.
We are all born free from all religious affiliations and only come to believe in such things after being introduced to it ― so, atheism is the default position. Although some children are not indoctrinated with a specific religion before the age of reason, there are many more who are.