In any society there have been and will always be disputes including in politics. The dispute can be resolved by frank talk and mutual satisfaction. In the worst case scenario the stronger simply crushes the weaker party in various ways. The weaker party may be punished directly (lose job, property, jailed, killed or forced into exile) or through his/her relatives (lose job, property, jailed, killed or forced into exile). Some of them survive and wait for the moment to settle scores. When opponents or relatives are being punished, more often than not, there are witnesses, who will not forget or forgive.