Because he(satan)led a coup 1/3 of God's children followed him,so God had a choice kill satan right then and there along with those 1/3 or destroy the age with everyone being born of woman with no recollection of that time.
Peter can explain it better
II Peter 3:4 "And saying, "Where is the promise of His coming? for since the father fell asleep, all thing continue as they were from the beginning of the creation."
II Peter 3:5 "For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water:"
Most Christians today, and all of the worldly people today are willingly placing their selves in ignorance on this matter of the creation. Old as it is spoken of here is very ancient, goes far back before the time of Noah and Adam, and even before the creation of the animal world and the earth age as we know it now. Peter is telling you that in the far past, there was a first earth age. Not a different world or planet, but the same planet [earth] existing in a time frame prior to as the earth exist today. The same world, but a different world age or time frame.
II Peter 3:6 "Whereby the world that then was, being overflowed with water, perished:"
That world age or cosmos that existed in that ancient time of the past, and everything that was a part of it was destroyed completely. All life on it was completely done away with. God destroyed it completely and it happened at Satan's overthrow. Many people believe that this flood was the flood of Noah's day, however, the flood of Noah's day did not destroy this world age, life from before that flood carried right over into the dispensation that followed one year later, after the waters had subsided.
Even in the first two verses of Genesis, God declared that there was a first earth age. Lets go there and study what the Word actually says there.
Genesis 1:1 "In the beginning God created the heaven and the earth."
There are two bodies mentioned in this verse; the heaven and the earth. It simply states a fact, and left the time factor out. This verse not only did not say when, but left it totally to our imagination, as to the eternal span of time, and who the creation took place. In Proverbs 8:22we read of wisdom speaking through Solomon. Wisdom is God, for all wisdom is of God. "The Lord possessed me in the beginning of His ways, before the works of old." What works of old could this be? It is the old earth age, spoken of in Revelation 12.
Genesis 1:2 "And the earth was without form, and void; and darkness was upon the face of the deep."
Who is the Spirit of God? He is the Holy Spirit, and it is God's Spirit that moved upon the face of the waters. In the Hebrew text the translation of the word, "was" as used in this verse "..
.the earth was without form,..."; we see in the Massorah test it reads "(to
become) without form...". The earth was not created a ruin but it became a ruin after the fall of Satan. It is the translators that changed the word from became, to was when they put it into English. This is the same thing that happened in
Genesis 2:7 "...and man became a living soul."
The correct translation of the Hebrew from the Massoretic text for these words, "...
without form..." is
"tohu-va-bohu". So we see that the earth was not created "
without form",
but it became [tohu] without form and void". Lets go to Strong's Hebrew dictionary, reference number 1961 to verify the word "was", that we read in this verse. "
Hayah,
haw-yaw; a prime root, to exit; to become, or come to pass."
Now lets continue in the Strong's Hebrew dictionary to get the pure meaning for the word "void". # 2258, on page 36 tells us that we have to go to # 2254 for the prime root word for the meaning of the word "
void". "
Chabal, khaw-bal; to wind tightly as a rope, to bind, to pervert, destroy, to corrupt, spoil, travail." This corresponds with its other use in # 2255, which is "
to ruin".
"Tohu" of the earth, then means that total destruction has come to pass upon the earth. The second "was" in the verse is in italics type because there is no verb "to be" in the Hebrew language. This is one of the problems in translating Hebrew into English, the verb "to be" is not distinguished from the verb, "to become".
At the end of the first earth age of
Genesis 1:1 that age ceased to exist in its precious form. God created the earth to be inhabited, and then He destroyed it. There was an entire earth age that existed between the first two verses of Genesis. This first earth age is spoken of in
Jeremiah, Proverbs, and Jude, as well as in
II Peter. We will look into these Scriptures and try to understand the deeper meaning of our Father's Word.
If you don't understand that there was a first earth age, you will not understand why God would say in
Malachi 1:3; "
And I hated Esau...". God hated Esau even while he was in his mother's womb. It was in the first earth age that God hated Esau, because of what he was and did in that first earth age. It was what Esau's soul did in that age, that angered God so; and that anger passed on to the embryo of Esau when his soul entered into this earth age. This is also recorded in
Romans 9:13.