From about 105 BC onwards, the power and influence of this handful of Parthian noble families was such that they frequently opposed the monarch, and would eventually be a "contributory factor in the downfall" of the dynasty.
Desde ao redor do ano 105 a.C. en adiante, o poder e a influencia do grupo de familias nobres partas era tal que frecuentemente se opuxeron ao monarca e, co tempo, chegarían a ser un "factor decisivo na caída da dinastía".