Now we would like to give a quick glimpse of how the crucifixion became the primary tool for execution in antiquity. Before the crucifixion was introduced to the Romans, it had already been in place amongst the Persians, Phoenicians, and the Carthaginians. It is Alexander the Great, who introduced crucifixion to the Greek Roman world. In Rome, this was considered to be an unworthy act of a good Roman citizen. Only slaves and non-Roman citizen were subjected to be crucified.