Just like We all inherited sin and death from our first parents Adam and Eve, before we were all born, Jesus died as a ransom sacrifice for all. The Bible makes no indication that there would be a cut off year and those born after a certain time would not benefit. That would not be fair, and the Bible is very clear that Jehovah is a God of justice. (Romans 2:11)For there is no partiality with God.
Jesus’ sacrifice corresponds exactly to what Adam lost—one perfect human life. (1 Corinthians 15:21, 22, 45, 46) The Bible says: “Just as through the disobedience of the one man [Adam] many were made sinners, so also through the obedience of the one person [Jesus Christ] many will be made righteous.” (Romans 5:19) This explains how the death of one man can pay the ransom for many sinners. In fact, Jesus’ sacrifice is “a corresponding ransom for all” those who take the steps necessary to benefit from it.—1 Timothy 2:5, 6.