Why did God create existence in the order he did?

I have been thinking about this for quite some time now. This would also help to explain why the evidence of "men" is found that is older than our "Biblical" world indicates.
When God created male and female, on the sixth day, He told them to be fruitful and multiply, and fill the earth... to have dominion over all the animals, etc.... and that all happened on the sixth day.
I am coming to believe that chapter two begins the story of the family of Adam. "Mankind" already existed on the earth, perhaps for thousands of years? Then God began the family of Adam.... intending that they live in the land of Eden, in the garden..... until they messed up.
So, when Cain was banished, he said he would have to be a vagrant and a wanderer, and "whoever finds me will kill me"..... who would have been out there to find him and kill him?
One fly in the ointment of this theory is the verse that says Adam called his wife Eve, because she was the mother of all living.... but that could be that Adam didn't know there were other "mankind" out in the world.... so Eve would have been the mother of all of the family of Adam...

Also, why was it important to trace Jesus' lineage all the way back to Adam? (the first son of God) Why not just back to David?

Interesting stuff, and it would fill a lot of gaps in the evolution/creation argument.

Not "Mankind"(descendants of Adam) though,,, "Men of old" Genesis 6:4 https://biblehub.com/interlinear/genesis/6.htm a completely separate creature. Adam was the first created in the image of God which is why it begins at his toledoth https://biblehub.com/hebrew/8435.htm there's the generations(toledoth) of the "heavens and the earth" (and) then there's the toledoth(generations) of Adam. The generations of Adam takes place across 120 jubilees.

In Matthew 1, those 41 generations between Jesus represent 41 jubilee cycles,

I agree, but it should be 123 jubilees instead. In Matthew 1, those 41 generations between Jesus represent 41 jubilee cycles, and the Church, as the generation of Jesus also lasts 41 jubilees. We're in the very last one. Think about the "birth pang" analogy. The conception of Jesus took about 41 weeks from Hanukkah (Kislev 25) to Tabernacle (Tishri 10), those are 41 gestation weeks. The three phases (Abraham to David, David to Babylon Captivity, Babylon Captivity to Christ) symbolize three trimesters. That's the secret in Matthew's genealogy of Jesus.

A day is as a thousand years... 120x49 jubilee years = 6000 years + the millennial = 7000 years(Gen 2:4) the creation story is a prophecy... then after the thousand years the Devil is loosed a little season... In the day ye eat thereof ye shall surly die, Adam died at 930 in the first day(1000 years)... This generation(toledoth Adam/man) shall not pass till all be fulfilled... https://biblehub.com/interlinear/genesis/2-4.htm

The definition of a year is unclear, though. If you use lunar year of 354.36 days, then a jubilee cycle would be 17718 days, equal to 48.5 solar years of 365.25 days. That 0.5 year is six month plus ten days, which is exactly when a jubilee year starts - the day of atonement. And then you have the prophetic year of 360 day; and then if you wanna fit 41 cycles into exactly 2000 years, a year would be about 363.6 days.

If the grain is over ripe or under ripe it will not be received(first fruit/no spot nor blemish) so from time to time one will add an month or remove an month. Hmm where are the sons of Issachar?

I have been thinking about this for quite some time now. This would also help to explain why the evidence of "men" is found that is older than our "Biblical" world indicates.
When God created male and female, on the sixth day, He told them to be fruitful and multiply, and fill the earth... to have dominion over all the animals, etc.... and that all happened on the sixth day.
I am coming to believe that chapter two begins the story of the family of Adam. "Mankind" already existed on the earth, perhaps for thousands of years? Then God began the family of Adam.... intending that they live in the land of Eden, in the garden..... until they messed up.
So, when Cain was banished, he said he would have to be a vagrant and a wanderer, and "whoever finds me will kill me"..... who would have been out there to find him and kill him?
One fly in the ointment of this theory is the verse that says Adam called his wife Eve, because she was the mother of all living.... but that could be that Adam didn't know there were other "mankind" out in the world.... so Eve would have been the mother of all of the family of Adam...

Also, why was it important to trace Jesus' lineage all the way back to Adam? (the first son of God) Why not just back to David?
.

Exactly...and you make some excellent points.
If people had not been given the creation story we all know, they would have read Genesis one and two as two stories of creation. One of the creation of the universe..the other the creation of the Garden in Eden and those who came from the Man..Adam..God placed in the Garden of Eden. We all know that Adam was called the first Son of God, so his Sons would also be Sons of God. With this knowledge (Genesis 6:4) can be read as it was meant to be read. Adams Sons...AKA..the Sons of God took wives from the Sons of Man created in Genesis one.
There were giants on the earth in those days; and also after that, when the sons of God came in unto the daughters of men and they bore children to them, the same became mighty men who were of old, men of renown. (Genesis 6:4)

Ahh.....But how do we explain the Giants?
Those animals Noah put on the Ark, they were the ones God created in the Garden of Eden. Those Animals God created in Genesis one...were the Giants...What we call today...the dinosaur!!
This is why they do not exist today, they were not put on the Ark...So they all perished in the flood.
In other words...these Giants were here before the flood, but not after the flood.
So why are they mentioned?
Since they didn't have a dating system, the writer simply uses the Giants as a reference of the time, the time when all this took place. Much like we say to those in future generation...the Great Chicago fire happened in 1871.
Simply put...The time of the Flood was a time when the Dinosaurs (Giants) walked on the Earth.
and also after that...refers to those Giants who were put on the Ark..like Elephants and Giraffes.
The Giants existence, which lived before and after the flood, creates a Time Frame.

How does it explain where Cain's wife came from? Just curious. Many say Cain met and married her there as if she came from Nod, but the text does not say that, while it does say that Cain built a city there and named it after his son who was conceived there. It seems just as plausible - or even more so - to me that they were already married, and went there together. But either are assumptions

No, those giants were ten foot tall humanoids, the same giants in the land of Canaan. They might be accredited for a lot of "ancient technologies". Those were like demigods that humans worshipped, and they were the main reason for the flood and the supposed genecides in the land of Canaan.

You may want to read the whole story about the Giants in the Land of Canaan. If you do..you will discover it was a total fabrication, which men the men who told this lie..paid with their lives.

For me, there is only one plausible explanation to where Cains wife came from...That is, there must have been other people living during those days. Any other explanation is implausible, because if what I say is not true...that would mean we all came from the same bloodline. Ask a geneticist what we would look like if this were the case. We would have been so deformed, I don't believe we could have survived more than a generation or two. That fact alone should be more than enough proof that the creation story we all believed to be the truth...is nothing more than fiction.

It's critically important because Jesus is the SECOND and last Adam. The word was God and with God in the beginning, but the man wasn't. Adam as the first man was the prototype of Jesus, he was made in the image of God and sinless at first - until he failed the test. The entire bible was about God's salvation for mankind. The last three chapters of Revelation are actually about the undoing of sin's curse upon Adam and the restoration of Eden.

sorry, but you guys lost me at "jubilees".... I am not a student of Judaica, and I don't believe in discussing minutiae, jots and tittles, and how many angels could dance on the head of a pin.
I think much of what we need to know gets lost in "details".... I'm more of a K.I.S.S. kind of guy...

It's not rocket science, just go read Leviticus 25. In summary, the 49-year "Jubilee cycle" is God's "great reset" of the economic system, also his unique way to synchronize the lunar cycle and the solar cycle. As I explained, a lunar year is 354.36 days, a solar year is 365.25 days, and there were two sets of calendars for lunar and solar years with half a year apart, and the solution to synchronize those two was by jubilee cycle - 17718 days, equal to 50 lunar years and 48.5 solar years.

For me, there is only one plausible explanation to where Cains wife came from...That is, there must have been other people living during those days. Any other explanation is implausible, because if what I say is not true...that would mean we all came from the same bloodline. Ask a geneticist what we would look like if this were the case. We would have been so deformed, I don't believe we could have survived more than a generation or two. That fact alone should be more than enough proof that the creation story we all believed to be the truth...is nothing more than fiction.