The break-up of the soviet union has seen nothing but peace since world leaders organized the different regions into countries based on ethnicity

This is false. Since the soviet union broke and eastern Europe got destabilized, numerous wars were fought regarding ethnicity and religion. Many of them are still being fought today as some people don't have independence, while some fight because they want to control certain areas of the land.

To be honest i thinks its between the first answer and the third answer