पितापुत्रयोर्भ्रात्रोर्वा द्वैराज्यं तुल्ययोगक्षेमममात्यावग्रहं वर्तयति ॥ कZ_०८.२.०७ ॥
pitāputrayor bhrātror vā dvairājyaṃ tulyayogakṣemam amātyāvagrahaṃ vartayati
A dual kingship—between father and son or between brothers—operates with equal security and risk, and it tends to produce factional capture by ministers.
Because two centers of authority create openings for ministers and factions to ‘capture’ decision-making, even if the arrangement can appear equally capable of providing security and welfare.
Avoid divided sovereignty; it enables bureaucratic/ministerial manipulation and weakens unified command.