Let's quit talking about religions for a moment, 90sAce and let's just look at some facts and interpretations.
Psychopaths (which has absolutely nothing to do with succes or no succes) are more eager to survive than non-psychopaths in a wild "survival of the fittest" scenario.
That's actually incorrect and shows a strong lack of understanding of what 'survival of the fittest' actually means.
In evolution survival of the fittest refers to the being the most resourceful and being able to adapt the best to one's surroundings - the "pop culture" rendition of the term portrays it as the "fiercest" or the "most brutal" always surviving, but this is completely false.
If you look at animals for example, humans are not the strongest, or the fiercest (ex. we don't have the killing power of a lion, or the muscular density of a chimpanzee) - we survived and dominated the other species because of our resourcefulness and intelligence, not because of our "ferocity".
Think if it as "brute force" versus "cunning and strategy" - the battle of Thermopolye as an example - the 300 Spartans may not have had the "brute force" as the vast Persian army, but were able to hold them at bay because of their superior strategy and discipline.
Psychopaths are statistically much less likely to thrive in the human world than normal individual, the extremely charismatic ones like Hitler and Stalin who acquire great power are very rare exceptions. The average psychopath is statistically much more likely to wind up in prison or be unemployed. This is fact.
Psychopaths are also less 'eager to survive' in the full sense of the word - they're more eager to acquire raw material 'pleasures' (this is due to the inability to bond with others in normal situation - which results in chemical deficiencies that they attempt to 'compensate for'). Psychopaths also are often lacking in judgment and make impulsive decisions which harm their chance of survival compared to that of a normal person (ex. a temperamental psychopath shoots a person over a simple insult, resulting in him being sentenced to deat in court).
In human terms, as I've explained - actual 'survival' in a social sense involves creation of a positive legacy (while in other animals, this can only be done through reproduction), not simply acquiring material gratification anyway - very few of them achieve any influence in life beyond the memories of their victims.
You could even say that immorality gets rewarded and therefore seems the logical way to go under pure individual evolution.
And you'd be completely wrong to say it. Unless you're talking about "other animals" (ex. carnivorous animals like crocodiles or Lions which have to 'prey' on wild animals to survive) - but using human standards of 'morality' in reference.to completely different species is apples/oranges.
Most evidence shows that positive social behavior is the most evolutionary successful. You need to learn the basics of evolution before discussing 'survival of the fittest' again.
I took a class in moral philosophy last year and this was pointed out as one of the main curiosities when talking about the inner morality of humans and why it exists. Why do most people have "moral instincts" when it doesn't seem interesting on an evolutionary level?
There aren't any actual examples of this - all moral instincts do have an evolutionary benefit - it sounds like you're basing this claim off of a false strawman about what "survival of the fittest means". That's why I'd learn from experts, scientists, etc, rather than some nutty professor in a "moral philosophy" class.
As I mentioned before, there are 4 main pleasure chemicals in the brain - one of these (oxytocin) can only be achieved through positive social interaction - and each of them does serve an evolutionary (as well as a 'moral' purpose'). A psychopath therefore would be deficient in this chemical, and therefore less healthy, and 'addicted' to chemical highs from material pursuits.
So yes, positive and altruistic behavior does have a practical and survival benefit (people who are socially isolated or anti-social are chemically deficient, and live much lower lifespans). Much more so than the short-term 'benefits' a sociopath might achieve (ex. through rape, robbery, etc). There is no 'moral behavior' which conflicts with reality or science, and when it does, it's the culture that decided that behavior is 'moral' which is at at fault, not reality itself
There are several theories about this subject.
The most convincing one for me was that we might have partly "invented" morality because it's a necessary tool if we want to live together in groups. We have to punish the ones that prey on the others or otherwise we just end up in chaos and an environment that noone can or wants to live in. A common sense of rationality (in a certain group) imposes moral rules on a specific society and it gets transferred to other generations through the ways in which children are raised, educated, etc.
There are various kinds of interpretations of morality in different cultures both throughout history and all over the world today, though. In certain cultures it's a necessity to kill someone at times to show your power and to let people know that they shouldn't mess with you, while in other cultures killing someone is (almost) always strongly condemned.
"Morality" itself wasn't 'invented' - it does in a sense exist in animals, as in animals do have an instinctive order and standard of behavior (they don't just 'kill each other or murder offspring right and left') - the behavioral concept comes from evolutionary biology.
The actual 'moral systems' we have invented are diverse - the trend seems to be that some (particuarily authoritarian systems like in North Korea) benefit only a select few at the top, at the expense of others - while other moral systems benefit people as a whole, and respect the rights of every man - the latter seem to be the most successful (which is why Western nations like the United States are so far ahead of totalitarian nations like Saudi Arabia and North Korea).
We can rationalize and argue about what system is the most ethical, but the fact is that, when you don't believe in a higher moral force, there can never be an absolute truth.
You could simply replace "God" with an omnipresent 'force' (which isn't actually a 'sentient being' itself) and get the same conclusion. Likewise you could just as well argue that if the "God" just exists without any reason, and has no higher moral force guiding
it, then there is no absolute truth - because it has no create or higher moral force guiding its actions - God's actions are therefore just a meaningless whim.
There are also things such as mathematics - no one believes that 2+2=4 only because a "God says so", for example.
On a similar note, if a belief is based purely on 'faith' rather than on things which are observable in nature - then there is no honest way to say a Jihadist's faith is any less "wrong" than that of a mainstream Christian.
In fact you could argue that the Jihadist has 'more faith' than the Christian since he's willing to kill and die for his "belief" and use this to his benefit.
"God is dead". There is no ultimate foundation you can rely on, nothing you can point to.
I'm not saying there needs to be an absolute moral truth (it would make things a lot easier, though), but the least thing you can do is recognize that there isn't one according to your view on life.
How is that so? I'm a deist and believe in a designer.
Just not a designer that 'contradicts' its own creation (by unilaterally deciding that the 'moral course' of action conflicts with the actual observable social benefits, and expecting us to believe this based simply on 'blind trust' in one of many religious leaders, all of whom claim to 'speak for God' but being unable to prove so). This puts me in line with the Founders.
Don't try to convince yourself with fallacies that there is a certain fairness to your world view, because everything will always lead to indifference in the end.
Biologically that's simply not correct. "Difference/indifference" is related to the pleasure chemicals in the brain - engaging in pessimistic thought can lead to indifference, but the problem is your presumption that believing "in a God" or not doing so immediately leads to pessimistic thought.
(Again, if God has no creator or higher power guiding it, then how can anything he does be 'good/bad', or 'right/wrong'? Unless someone created God?) If you spent enough time
thinking this way you'd probably feel very indifferent.
Indifference is usually caused by a deficiency in one of these chemicals (brought on by a bad lifestyle). If it would lead
you to indifference then you're likely investing too much of your sense of 'purpose' on a flaky belief which you can't validate.
As mentioned above - there are many facets of religious beliefs which are far more likely to lead to indifference.
E.X. If 'believing in Jesus' guaranteed salvation - then why not just rob, rape, and murder all you want? Just be sure to 'give your heart' to Jesus on your deathbed and you'll be Scott Free.
Be consistent and don't be hypocritical. Know where you stand for and confront yourself with it.
Reason and science? As opposed to "Allah/Jesus says so... just because... and I know it's true... but I can't prove it..."? The only people need confrontation are the latter, not the former.