Definitely free will.
If we never had the choice because of original sin to come to God, we would all die. Just looking at the way the earth spiritually functions - there are only two sides at work, good and evil. Those are your only choices, no in between. Both these forces coexists, and due to this coexistence, we automatically are given the freedom to choose what we truly desire spiritually.
God set the standard for both sides; if you choose God, you must abide by God and follow what is instructed of you.
If you choose against God, then you abide by the regulations of the world which is basically sin, self - satisfaction, and under the rule of the prince of this world which is Satan. What Satan does is ultimately lead those to rebel against God and justify this rebellion, so that one does not even think what they are doing is spiritually disastrous. This is why you will encounter non - believers, atheist, and even "Christians" who are working against God but aren't even aware because their sin appeals to their hearts more than the love of God.
Original Sin did not befall on all of mankind just because of Adam and Even in Eden; that parable represents all of mankind, and Eden represents heaven. All dwelled in heaven before the earth, and all came to sin by following the temptation of Satan who was the most corrupted angel of us all. Satan wanted a kingdom like God, even the throne of God itself - so he rebelled and coaxed many others to follow our sinful natures as well.
I want to point out here, that good and evil has always coexisted in us; also a clear sign that God gave us free will from the beginning. God knew of Satan's evil intentions, and he knew that the children would turn to sin eventually. The fact that God created us with two natures from the get go, means we had the option to choose.
Us, the sinners, who choose to follow our sinful natures, followed Satan to death. The Earth is not some we we little fun existence; you think God enjoys watching his children be beaten, murdered, raped and humiliated? Earth was and still is a death sentence.
Romans 6:23 testifies that the " wages of sin is death;" thus if we are the sinners, our destination originally for what we did prior to the earth, was to die.
Face the 2nd death as the bible calls it in Revelations.
The 2nd death is that of the soul; absolute destruction.
So then one must wonder why Satan tempted us and enticed us to fall to death? Satan just really hates God; he's extremely envious, wicked, and arrogant. He was angered that God condemned him for what he did, and thus attacked God's people to get at God.
What's the best way to hurt someone's parents? Kill their children.
That's why you see verses about " and he waged war with her offspring," or the one in Revs about the dragon waiting for the pregnant woman to give birth so he can gobble up her children.
The more of us who turn against God and die, the more pain will be brought to God. This is why God came in the flesh as Jesus Christ, because in the sinless crucifixion, God took our place in death, and this revealed the devil's betrayal - which got him hurled down to the earth.
The best way to express this complex concept - is that there are two types of sinners; those who sin intentionally and those who sin unintentionally. God is seeking to save the unintentional sinners, the one's who were lead astray by Satan but seek repentance and forgiveness from Father. The intentional sinners were those whom actively betrayed God and still betray God here on this earth.
I must clarify though, that there was a time when the intentional sinners didn't think rebelliously of God, but they begin to become corrupted to a point of no return it seems.
There's a passage in the bible ( sorry guys I don't have my notes to quote it,) in which God speaks about being the " potter " who creates some pots for common use and noble use.
The gist was that we all had to really realize and learn the love of God and see the darkness that is in us, and come to full repentance to become complete spiritual beings. Satan was the original example of this darkness, and then those whom followed him became examples for the righteous to avoid following.
Someone asked me if people are just born evil; no, because even evil people are capable of doing good things. However, even demons know of God's existence - so no man is without excuse or able to say " God you created me evil so it isn't fair I be punished for my sin." Unless you are mentally ill, everyone is aware of what they are doing. As for the intentional sinners from some experience,
They are haughty, arrogant, and declare from God as if they are above him. They have rebellious minds, rebellious hearts and live to appease their sinful nature. Now this doesn't necessarily mean atheist or non - believers; there are plenty of arrogant Christians who only believe in God because they want the perks of Heaven. This is very bad because when one falls deep enough, you become both spiritually deaf, blind, and come to receive the mark of the beast.
This is why the bible says, " If you are a friend of the world, you are an enemy of God." The world is Satan's kingdom, and if you abide by his regulations ( sin) and allow him to take authority over you, you are thus marked as his.
Luckily though, if you come to your senses, you can come to receive the seal of God and be cleansed from the beast's mark. This has conditions though, and the bible fiercely talks about those who get the seal of God but then refute back to their sinful ways and receive the beast's mark on their right hand.
So if your really struggling with God right now, the world and your Christianity, please please please pray and endure because often when you leave, it's terribly difficult to go back. Don't ever stop searching for God if you have questions or are confused - Matthew 7:7 " seek and you will find..." best verse ever lol.
Anyway, I've totally went off topic
I just get so excited explaining all this.
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The point here is that we have free will. And we have it because when one makes a choice free of anything else but what they feel in their heart and soul, they will pursue that choice and live by it out of sheer desire and well...love.