Arne Saknussemm,
You mean there is no evidence that you are willing to accept.
There is no evidence that would satisfy a scientific investigation. If there was then then we can be sure that said religion would quickly ditch their need for "faith" and say look - we have scientific proof. And despite the argument that asserts that religious faith is something magical and special, ultimately it comes down to belief without evidence, because, well, you have no choice.
The only way out of this seeming roadblock is for the theist to assert that scientific investigation cannot be applied since the type of evidence experienced by a true believer is direct perception. The idea that the deity communicates directly to the immortal soul and the true identity of the adherent. The issue here is that we have to take the word of the claimant without any known mechanism for independent verification. The problem with that is that we have no way to distinguish the claim from the much simpler and more credible observation that the claimant is suffering from self delusion.
I cannot show that direct perception does not occur, but I have not experienced it, and since self delusion seems the most likely especially in the absence of any scientific evidence, then yes, such a claim for evidence is something I am not yet willing to accept. And I do not think you have any right to actually claim it to be evidence if you cannot show it is not self delusion, or can you?
However, if you had in mind some type of evidence claim other than direct perception, then please explain. The only type I know comes in the form that a god must exist because we cannot explain things any other way. And there are named logical fallacy definitions for all those variants.
And there is just one God, you need not belittle Him by grouping him with Zeus, Loki and Quetzalcoatl.
Without any credible evidence that such things are possible it does not seem to be relevant whether we give any particular level of respect to any specific conceptual variation, anymore than we should give more credibility to any cartoon character rather than any other. Although, Mickey Mouse might be considered an exception.
And we could discuss 'other useful human created and beneficial observations of treating others with respect, dignity, tolerance, and love'. I look forward to it, but this thread was started by an OP that merely asks what shall we replace religion with. Now he may well have meant just what you say, but the only reason any of us think that is because we understand instinctively that treating others with respect, dignity, tolerance, and love is the real business of religion. So actually I am confused. The OP seems to have set us a conundrum: How do you treat people with respect, dignity, tolerance, and love in the absence of respect, dignity, tolerance, and love?
And so back to the thread topic.
The topic assumes that religion needs to be replaced with something if it were to somehow go away. From my personal experience with religion as a youth and from what I have observed since then that people are attracted to religion for either 1 of 2 reasons or both, and a rejection of a third.
1. There is a perceived spiritual need that is satisfied by the supernatural components of the specific religion. The prayer, devotion, obedience to the rule book, ritual, conviction that there is something greater, etc.
2. The desire to create environments, earthly or heavenly, of love, tolerance, dignity, altruism, respect for neighbors, mutual help, etc.
3. This aspect is the opposing features to type 2 - the evil, the murderer, the rapist, and those who give no regard for tolerance, respect, etc.
Type 1 alone creates the religious extremists that can be dangerous. The biblical literalists, or those that cherry pick specific scriptures that suit them and used to demonize others. These types can also be isolationists who simply want that deep personal relationship with their god and nothing else.
Type 2 encompasses all the human activities that have helped civilizations to organize, cooperate with each and grow with mutual respect for common goals. Many of these endeavors are integrated in the various scriptures. These practical outcomes are what most people can connect with and when things go well they feel content to attribute success to their religions, and the religions are hence further propagated.
Type 3 - The recognition that many people are just bad and perhaps evil, helps to unite those who want to oppose such people and their activities.
I suspect there will always be those of type 1 who will never be able to accept that we are here alone and that what we have is all there is. Even if we were to show that the soul does not exist they would still need to seek something superior. So I am sure religion in some form will continue to exist for the foreseeable future.
For those of type 2 there is some confusion since they want to stay grouped with their like minded adherents and want to exclude the type 3s. The misconception is that if religion was to go away then they would not be able to separate themselves from the type 3s. They also tend to see that types 3s are all non-believers and that strengthens their desire to stay as a religion.
The transition, if it occurs, will require the recognition from those in the type 2 group that there are a large number of non-believers who share the same type 2 attributes and needs, but simply without the supernatural element. Both the believer group and the non-believer group want and need to exclude the type 3s.
As science and technology continue their exponential paths to ever more understanding and discovery of the universe and humans I suspect the illusions of the supernatural will become less and less believable. Science will continue to shatter them as it has been doing for thousands of years. This simply means that the type 2 non-believers will continue to grow as current statistics on religious beliefs around the world has been showing for some time.
The extremists in type 1 will always find a way to exist in some form of religion and I suspect the bad side of human nature will also prevail as type 3s. The effective end to religion will be when everyone who simply favors love, respect, tolerance, etc, as the primary goals of human life learn to combine and that the concept of belief and nonbelief will cease to have any significant degree of relevance or meaning.
Some posters above have argued that atheists and cavemen and maybe even atheistic caveman had a handle on civility and fair play, and giving their neighbor the cloak off their back and walking that extra mile, but no, I'm sure that much of such thinking originated with a bearded revolutionary Jewish fellow, and his name was not Karl Marx.
It seems fair to accept that we likely would not have succeeded as well as we have over this past 2 million years without significant mutual respect and cooperation for common goals. The Jesus mythology though is not unique and borrowed heavily from earlier and older civilizations. But its duration for these past 2,000 years is less than 0.1% of human existence. We survived quite well without Christianity for 99.9% of our existence and will certainly to continue quite nicely without it.