What is right and what is wrong and how do we know? Good brings about fortune. If you were never good, and were always bad, you wouldn't make any money. Evil is purposely doing bad, and again, requires at least some good strategically to earn money.
Good also brings about profit other than money. If you always perform bad in front of others, you likely won't make other friends.
Avoiding pain is a good in itself.
Our gut instincts know what good is because we know what pain is like and unless there's a good reason as to why not, all others will avoid pain.
Our gut instincts know that wasting resources leads to waste pile up and reduction of availability.
Theft is bad unless the person deserves theft. Which is dependant on how they're using their stuff/money. If a country is making false war with other countries, it may be a good thing if that country receives a financial attack. There's some strategy involved with morality.
Most of morality can be deciphered by gut instincts from wise minds. Pain is a no unless deserved. Theft is a no unless deserved. Finding out whether or not someone deserves a bad thing happen to them is dependant on a wise judge who can tell if a person is ultimately bad or ultimately good. If a person is ultimately good, there is no reason something bad should happen to them. Someone is ultimately good when their performance is more good than bad.
Some ultimately bad people are so petty, a perfect judgement would tell that they are forgiven for their bad. The judge also has within it the capacity to forgive if that poor morality is not evil - at least it's not evil - and the person may have an excuse as to why it's morality is poor.
What's right is what's profitable in every sense of the word(money, health, friendship, paradise, etc). What's bad is what's not profitable. What's evil is what's a complete abstraction of what's profitable.
Performing good brings about good in return. Performing bad brings about bad in return. Evil brings about more bad. What's good is up to wise minds to judge using their gut instincts, it can't always be what's not bad to a person--- there is strategy involving a moral power play. At the end of the day, there would be no profit if there wasn't some semblance of good.