9. The first parents disobeyed God and sinned
God created Adam and Eve. He gave them supernatural and preternatural gifts and placed them in the Garden of Eden. They were happy there: they were God’s friends and did not suffer any harm; they worked, but would not get tired... After having been happy on earth, they would have gone - without dying - to enjoy God in heaven forever.
But Adam and Eve committed a serious sin: the original sin. The third chapter of Genesis tells us about that sin: they disobeyed God and offended Him. Since Adam and Eve were our first parents, all men inherited this sin. From it sprang pain, suffering, hatred, wars and other calamities that men and the world suffer.
Therefore, it is convenient to study this subject. If well understood, perhaps many bad things that happen in the world and within every man could be better understood.