Historic orthodox Protestants believe that human beings are in bondage to sin. The most classic work on this belief is undoubtedly Martin Luther's BONDAGE OF THE WILL. Human beings are born into this bondage, and they also willingly choose to remain in this bondage because they love sin and hate Jesus (see Jn. 3:19-20). Human beings remain in this bondage unless they are set free by the power of the Holy Spirit, who uses His Word to do the work. Once liberated, an individual sees the beauty and sweetness of Christ and freely chooses Him. A believer is in the state of Adam prior to the Fall - able to sin or able not to sin (in the classic Augustinian formula). Unbelievers, while they remain in bondage, are free to make whatever choices they desire. The problem is their DESIRE. They do not love the Light, because their deeds are evil, and they WILL NOT COME to the Light. This is not the fault of Jesus Christ, this is the fault of the rebels. Nonetheless, unbelievers do whatever they want. The real contention between us, that is between "Calvinists" and "Arminians", is over the magnitude of sin (total depravity, if you will). We believe that Jesus Christ has been sent by the Father because God loved all peoples - those from all tribes, tongues, peoples and nations ("the world"). Jesus who lived perfectly, died on the cross for sinners (see Rev. 5:9), and rose again from the dead. Jesus ascended to the right hand of the Father, where He now makes intercession for His people - for believers. The Holy Spirit is now applying the work of the Son, convicting the world of sin, righteousness and the judgment, as well as using His Word to bring about the new birth. The Holy Spirit also seals believers. God holds all people accountable for their actions, words and thoughts. This is because all individuals are free moral agents. Now, you may want to dispute these points, but it is what Reformed folk believe.