It is my view, based on evolutionary processes, that we are born with the innate propensity for helping our fellow humans, but like a muscle with the potential for strength, that potential for good either atrophies or is strengthened by the nourishment and exercise it receives from familial and societal expectations.
Morality must be taught to us. When we are first born, we act simply on our animal instincts such as peeing all the time, drinking milk, sleeping, and crying. Yes it's completely healthy for a baby to do all of this but when the child gets older if they are not socialized or taught about morality then they will not learn about it. Morality comes simply from being taught.
Mark 7.2~23 What comes out of a person is what defiles him. (For from within, out of the heart of man), come evil thoughts, sexual immorality, theft, murder, adultery, coveting, wickedness, deceit, sensuality, envy, slander, pride, foolishness. All these evil things (come from within,) and they defile a person... Evilness comes from within, we are born into it, therefore, morality needs to be taught.
Morality, for the most part, is the verdict of the majority. This verdict depends upon the intelligence of the people; and the intelligence depends upon the amount, form, and quality of the average brain. Hence, morality doesn't come from without, but must be earned from within.
We are conditioned beings, and our happiness depends upon conditions. Man, by experience and reason, should find out the conditions of happiness, and then act in accordance with such conditions. Everything, that produces or secures happiness, is good, that is to say, moral. Everything that destroys or diminishes well-being is bad, that is to say, immoral. In other words, all that is good is moral, and all that is bad is immoral.
I insist that happiness, in its highest forms, is after all the only good—virtue the means—and anything that wipes a tear from the face of man is moral. And nothing can be more immoral than to waste your own life, and sour that of others. This great truth is, in my judgment, the gospel of morality.
All morality comes from God. If God did not exist, we would have no reason to believe in morality. There's no way to determine whether something is right or wrong without acknowledging that there's a reality beyond a closed system of naturalistic flow and cause and effect. If the naturalists are right, then there's no reason for any particular moral code to take precedence over another. We know that naturalism is false, and we know that there is a God. In fact, we know that the one true and living God is the God of the Bible, the Father of our Lord Jesus Christ. We know that, and we know that our concept of morality comes from him.Human beings are never morally neutral; we have a law written on our hearts, and the creator made us with consciences to remind us of this law. We have an innate ability to tell right from wrong. That ability can become weak, and we can choose to ignore it, but it can also be a powerful force for good. http://robertbsloan.com/2013/02/18/god-morality-and-whittaker-chambers/
There are those that believe the native child, absent any social or cultural input, will develop a moral code. I am not one of them. I believe morality and ethics are partly culturally, partly societally, and partly taught and nurtured by families. They rarely are arrived at by rational process, but are emotionally connected to our early experiences of life and family. The opposite of an ethical person is a Sociopath. Sociopaths seem to develop in families with bad parenting and/or emotional abuse or deprivation. Clues? Bed wetting after 5, combined with cruelty to animals and starting fires, you may have a budding sociopath. It's theorized they know they are different but become excellent actors to hide the difference. One thing: the average person blinks 12 times per minute; sociopaths don't blink very often.