 In modern-era Greek folkloric survivals of Charon (as Charos the death demon), sea voyage and river crossing are conflated, and in one later tale, the soul is held hostage by pirates, perhaps representing the oarsmen, who require a ransom for release.The mytheme of the passage to the afterlife as a voyage or crossing is not unique to Greco-Roman belief nor to Indo-European culture as a whole, as it occurs also in ancient Egyptian religion and other belief systems that are culturally unrelated.The boatman of the dead himself appears in diverse cultures with no special relation to Greece or to each other.