In former Yugoslavio the split is again "enforced" or "allowed" based on the arbitrary criteria from the past. The only "rule" here were "rule of armed force" a

In former Yugoslavio the split is again "enforced" or "allowed" based on the arbitrary criteria from the past. The only "rule" here were "rule of armed force" and "interest of the mighty". Some ethnic group were allowed to have their right to decide in which country they want to live, some never got that right. In the end that injustice is what led to the whole bloody conflict.