Suing a third party for damages alleging the other party brought the demise of the marriage is called laws

The answer is second party statute. In older American cases, the party of the first part; and the party against whom the case was conveyed as the defendant, or, in older American cases. Courts use several terms to recognize the role of a particular party in civil litigation, usually identifying the party that brings a lawsuit as the plaintiff. 

julius caesar turned the roman republic into the roman empire by coming in and taking the "dictator" role during the time of a civil war (elites vs lower classes) winning battles and reputation, then declaring him dictator for life

hope this : )