I firmly believe that there is a Gap of time between Genesis 1:1 and 1:2; I do NOT believe in evolution, "Theistic" evolution, the "Day-Age" theory or any of that other nonsense. I do not believe in pre-Adamic death or human races; to believe such things is to go against clear Scriptures about death, sin and God's creation. What I DO believe, however, is that God's first earth (and heaven-SINGULAR) was inhabited by a race of spiritual beings, known in the Bible as the "sons of God." Today we know them as angels and devils: angels are the perfect beings that have served God from the Creation, and devils are those that rebelled against God and were cast out with Satan. In the cataclysmic battle that followed (paralleled in Rev. 12), the entire creation of God was destroyed: i.e. "without form and void." I believe this whole occurence was likely less than 1,000 years long; perhaps it parallels in reverse the Tribulation period (1,000 years of peace, 7 year rebellion, destruction and recreation?).
Regardless, we know that these "sons of God" were present at the creation, even before Adam.
Job 38:4 Where wast thou when I laid the foundations of the earth? declare, if thou hast understanding.
5 Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it?
6 Whereupon are the foundations thereof fastened? or who laid the corner stone thereof;
7 When the morning stars sang together, and all the sons of God shouted for joy?
Obviously these creatures, whoever they were, were present at the creation and beheld God's wondrous power that fashioned the earth out of nothing. These same beings show up in the first part of Job:
Job 1:6 Now there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them.
Job 2:1 Again there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them to present himself before the LORD.
These creatures are obviously spiritual, for one cannot physically present himself before God and converse with Him vocally, nor was that possible in those days. They also show up in Genesis 6 (don't give me this "godly line of Seth" nonsense; that's completely retarded), so these guys are rather well-known. But the question anyone might ask is "why are they called 'sons of God'?" Well, I'm glad you asked.
Luke 3:38 Which was the son of Enos, which was the son of Seth, which was the son of Adam, which was the son of God.
Here, Adam is called the "son of God." Why?
Gen. 1:26 And God said, Let us make man in our image, after our likeness:
Why is that relevant, you ask? Well let's see: Adam was made in God's image, a trichotomy. The other "sons of God" (Angels and fallen angels; sorry, spoiler) were also made in God's image, though they were completely spiritual (though able to take physical form). So we've established that the "sons of God" are those that have the image of God.
Today, mankind is made in the "image" of ADAM, NOT God. When Adam fell, the part of him that communed with God died, and his soul became inextricable with his body: i.e. for the rest of the Old Testament, until the writings of Paul, "soul" and "body" are completely, 100% synonomous. Therefore, anyone who is born today is a son of ADAM (C. S. Lewis had that right, messed up though he was!), NOT a son of God!
Why then are we called "sons of God"?
John 1:12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
Rom. 8:14 For as many as are led by the Spirit of God, they are the sons of God.
Phil. 2:15 That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world;
1John 3:1 Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not.
Why? Well, at Salvation, something unusual (and a little "odd-sounding") happened to you: you were circumcised. Yes, even you ladies. Verses? OK.
Col. 2:11 In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ:(emphasis mine)
This circumcision had nothing to do with the "privy member," as the Bible says: it had to do with your SOUL and your BODY. Your body, or flesh, is permanently wicked: "in me, that is in my FLESH, dwelleth NO GOOD THING." Your OLD NATURE is perverse, wicked and vile, and all it wants to do is SIN. However, when you get saved, God performs an OPERATION without hands on you. Verse again? OK. Next verse, actually, so still in the same context:
Col. 2:12 Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead.
Amazing, isn't it? When that spiritual circumcision takes place, you are then a NEW CREATURE, created in the IMAGE of GOD. Therefore, you are now a son of God, made in His likeness and not Adam's! God cuts away your justified soul from your grave-bound body; the body returns to the dust, but your SOUL will now go to be with God forever when you die.
Oh the riches of the fulness of His grace!! Amazing love, how can it be, that THOU my GOD should'st die for ME!