DJ, I'm pretty sure human kindness existed before religion because we can see kindness in primates, monkeys, and all sorts of social animals. Maybe it's better worded that human kindness exists without religion.
Draugnar, I would say that charity's are funded by people not religion. Do Christians (or religion) represent a larger portion of charitable donations than the portion of the population they represent? What about the GDP they represent? I'm not seriously asking you to go out and find the numbers, I'm just making a point. =)
Alderian, I will say that I agree that religion provides social cohesion, but I still don't think it's a good price to pay. You're right that a lot of old advice is manifested in religion and other mysticism, just under different jargon, ie. vomiting when poisoned so as to "purge evil spirits". But this is secular knowledge and doesn't owe anything to religion or divine word. People have known that people get more sick off of eating pork than beef long before it was written down (otherwise how would they know what to write). Is God required to pass an uncompromising rule so that people know this? No, they could just be told... and the uncompromising rule always falls into obsolescence when secular knowledge is updated to include the reason why people get sick more often from eating pork than beef. Then it just holds us back.
And the Ten Commandments? Give me a break. More than half of them are ridiculous now... You shall have no other gods before me? You shall not make for yourself an idol? You shall not make wrongful use of the name of your God? Remember the Sabbath and keep it holy? I mean the only ones that are even really a part of modern law are you shall not kill, you shall not steal, and you shall not bear false witness against your neighbour. And trust me, these sorts of things are common sense, burned into our human nature. Every society and every religion knows these things... no society could exist if murder and theft were rampant. Even monkeys have been shown to have a sense of fairness.
I don't mean to be derisive, but it seems that most of the benefits touted in the name of religion is really just secular knowledge clothed in religious text.... as though it came down by divine word when it was really just learned through experience and cultural transmission. I mean, when missionaries came to the New World, the heathens weren't convinced by the awe-inspiring and obvious truth of the New Testament, but by the amazing technology and advances that the Spanish brought with them...
Also, if I recall correctly, Islam is currently the fastest growing religion in the world, though Christianity remains the majority. I don't see Islam becoming the only religion, but certainly in some time it will become the majority.