Answer

Jesus was the only person in history who chose to die in the place of others.

Someone might stand up at this point and say that there have been many people in history who have chosen to die in the place of others...but note that these people only chose the time that they were going to die...they were going to die anyway...eventually.

Adam chose to die when he chose to sin...but his choice to die wasn't in the place of others...it actually was the cause of death for others...everyone he was representing...the whole human race.

Jesus, the sinless One, did not have to die "IF" He wasn't coming to die as our substitute...so He not only chose the time in which He would die...He also chose to die...He left the glories of heaven to save us from our sins...Jesus is the greatest hero the world has ever seen!