The Iroquois believe that the man that the first woman on the Turtle's back brings forth to the earth is different when compared to the beings and every other thing that the twins create and do.
They recognize that the first man on earth gives contrasting natures to the twins, who represent the duality of good and evil. This is unlike the twins who cannot produce anything different from how their natures have been from their birth.
This means that the first man on earth has a combination of good and evil in himself but produces two twins who lack the same combination. Since one twin is left-handed, he is completely evil, while the right-handed one is completely good.
Evil is necessary for good to exist, according to the Iroquois. Without evil, there is no good, and vice versa.
Thus, the Iroquois believe that evil should co-exist with good because they give balance to each other, and this summarizes their belief about man.
Compared to the other beings that the twins created, the Iroquois believe that man is
special due to the fact the twins both had a role in creating him. Man has a dual nature of good and evil.
In the creation story, we learn that the good things were created by the right-handed twin while the destructive beings were created by the left-handed twin.
In the creation of man, there were differences. He was not just made from clay. He was also baked in fire. Also, both the right and left-handed twins had roles to play in man's creation.
This shows that the duality of good and bad that can be found in man.