St. Paul said,
“…the free gift is not like the trespass. For if many died through one man’s trespass, much more have the grace of God and the free gift by the grace of that one man Jesus Christ abounded for many.” (Romans 5:15, ESV)
Adam’s sin spread to every human because the fundamental relationships between humans were irreparably broken in that instance. We fell down a hole that we could not dig ourselves out of.
Christ’s salvation spreads to every human because his act of forgiveness does the exact opposite. As we simply trust in Christ, he empowers and energizes every person to follow him in forgiveness in the Spirit.
Humanity is being healed and hauled out of the graves we have dug for ourselves.
“Therefore, as one trespass led to condemnation for all men, so one act of righteousness leads to justification and life for all men.” (Romans 5:18, ESV)
Thanks be to God!