Which event is credited with helping to ingrain the paternalist ethos more deeply into the lives of southern slaveholders

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

i need this answer                                                                 .                                                          

to find facts and details to use as evidence! : ) hope this .