Taking The Reductionist Approach regarding morality:
Given: "Imagine that society and all of its religions, all of its philosophers, all of its gurus, all of its wise men, all of its documents and documentaries, all of its orally transmitted data, all of its recorded, written, and memorized lessons were vaporized and could no longer be accessed by sentient beings."
Only one child survives this destruction. The child is just at the age whereby it has the ability to search, forage, discover, experience, and learn from its mistakes and successes. All of its feelings, emotions, exterior and interior sensibilities are healthy and functioning. It wants in no way for physical health at first, nor for shelter or sustenance, having been placed in a garden of plenty with limitless resources.
What set of morals would the child develop over its (short) life-time from that point forward?
What Makes an Elder? :
A head of gray hairs doesn't mean one's an elder. Advanced in years, one's called an old fool.
But one in whom there is truth, restraint, rectitude, gentleness,self-control, he's called an elder, his impurities disgorged, enlightened.
-Dhammpada, 19, translated by Thanissaro Bhikkhu.