Assuming the rationally unobjectionable utility function of ‘ensure continued co-existence’ one must assume it to be at least the implicit guiding principle of at least every human being. But who is running around chanting ‘Must. Ensure. Continued. Co-existence.’? Not many. It follows that the implicit utility function Fi(i) generally diverges from the explicit utility function Fe(i) in humans and that those whose Fe(i) best approximates Fi(i) have the best chance for ensuring continued co-existence.
Fe(i) can be best understood as an evolved belief in regards to what should guide an individual’s actions while Fi(i) is what rationally should guide an individual’s actions.
Not long ago
Philosopher 1: “You should be selfish, because when people set out to improve society, they meddle in their neighbors’ affairs and pass laws and seize control and make everyone unhappy. Take whichever job that pays the most money: the reason the job pays more is that the efficient market thinks it produces more value than its alternatives. Take a job that pays less, and you’re second-guessing what the market thinks will benefit society most.”
Philosopher 2: “You should be altruistic, because the world is an iterated Prisoner’s Dilemma, and the strategy that fares best is Tit for Tat with initial cooperation. People don’t like jerks. Nice guys really do finish first. Studies show that people who contribute to society and have a sense of meaning in their lives, are happier than people who don’t; being selfish will only make you unhappy in the long run.”
Philosopher 1 is promoting altruism on the basis of selfishness
Philosopher 2 is promoting selfishness on the basis of altruism
It is a contradiction – a paradox. But only in thought – not in reality. What is actually taking place, is that both philosophers have intuitively realized part of Fi(i) and are merely rationalizing differently as to why to change their respective Fe(i).
The first one by wrongly applying the term selfishness on the fallacy that a higher paid job contributes only to his personal continued existence by giving him more resources while in reality it contributes to ensuring continued co-existence because he is taking the job that is considered to benefit society the most.
The second one by wrongly applying the term altruistic on the fallacy that his recommendations are detrimental to his personal continued existence due to loosing resources by being Mr nice guy while it actually contributes to ensuring continued co-existence as it not only benefits him but other people around him as well.
The solution thus becomes that the intuitive concepts of altruism and selfishness are rather worthless.
An altruist giving up resources in a way that would lead to a reduction in his personal continued existence would be irrationally acting against the universal utility function thus being detrimental to all other agents not only himself.
An egoist acting truly selfish would use resources in a way that leads to sub-optimal usage of resources towards maximizing the universal utility function thus being detrimental to himself and not only all other agents.
It follows that in reality there is neither altruistic nor egoistic behavior – just irrational and rational behavior.