Adam and Eve sinned; they learned the difference between good and evil. Animals don’t know anything about moral philosophy yet humans did. The pair were evaluated and found to have missed the mark (sin). Ever since humanity has known the difference between good and evil and they have been in a thermodynamic containment facility. From natural immortality-spiritually perhaps, they were downloaded into mortality in a probably populated world. Jesus Christ atoned for the sin that is inherent in human beings. Those with faith in Jesus in particular are covered from the sin-debt by God who only sees The Son whom is perfect. God cannot tolerate sin in the eternal or divine economy. Sin means to miss the mark-as in archery. There will be no wobbly, off-kilter humans-wayward, willful and disrespectful of God that feel they can be as they are without correction going on into forever with the Lord Jesus Christ. The saved are blessed (it means to sprinkle with blood) by God who sacrificed his Son to pay the penalty for sin that is death. Humanity so often confused or loses understanding of the matter, as they do about wars and other matters that are inferior to peace.
https://www.youtube.com/watch?v=MWSRgPpYKrg&t=115s
