Jade Margery-
To understand the creation stories found in Genesis we need to understand to whom they were directed. They were for the edification of a people who had just left a nation (Egypt) that worshipped over 40 different gods and goddesses, each of whom had a physical form that was either the night sky, the sun, the moon, or an animal or combination of different animals put together. Every animal known to man was the personification of one or more of these gods or goddesses.
Examining the first creation story (Genesis 1:1 to 2:3) in this light, we can see a methodical dismantling of the egyptian mythologies. The animals around them were merely animals, the sun and the moon were merely objects in the sky that furnished us with light, and the night sky was merely other lights. All traces of divinity had been 'stripped' from them; they were only to be seen as part of the natural world.
The second creation story (Genesis 2:4-25) separated homo sapiens from all the other creatures. Again this was in response to egyptian mythology. According to the Egyptian Creation Epic the gods and goddesses only created more gods and goddesses for the first 5 days of the creation; on the 6th day they created all the animals, including mankind, and placed them on this planet almost as an afterthought.
The second creation story gave Man a special position. He was permitted to name all the other animals, a sign of power over them in that day. He alone could converse directly with God, and God was willing to converse with him. He alone had a mate that was created as a part of himself, and so was to be his trusted ally. He alone had a special place prepared for him (The Garden of Eden) where he could live in relative ease. Like the other animals, he was innocent of what constituted good and evil. But he had the ability to change that, whereas the other animals did not, and remain innocent even today.
Even what happened to the serpent in The Garden of Eden was a hebraic 'spin' on an egyptian myth. The serpent's name was Sebau in egyptian mythology, and Ra had engaged him in battle, hacked off his front legs, bound his back legs together, and thereby forced him to crawl on his stomach. But God was shown to be capable of doing this with only his will.
I myself believe in Intelligent Design. God has had a 'hand's on' approach to his creation from the Big Bang to the present day. I reject macroevolution, as some try to use it to separate what we see around us from God. Too many evolutionists have proclaimed that there have been no extinction level events since 65 million years ago, but the planet itself shows evidence that there have been ELE's as recently as 70,000 years ago, with many others having occurred betweeen that time and 65 million years ago.
How mankind came to know that there is good and there is evil, and even identify which actions correspond to these two opposites, can just as easily be described as a result of eating the forbidden fruit as any other explanation. But it's a 'given' that at some point in the existence of Man he lost his innocence. He knew from that point on that there was good and there was evil, and that he could consciously and deliberately choose which path he would follow. On the date that occurred, evil truly entered the world as we now know it.