Answer:
A lack of central government or a strong emperor
Step-by-step explanation:
The three kingdoms period in China lasted between 220 to 280 AD. During this period, China was divided into major three kingdoms including Wei, Shu, and Wu.
However, the three kingdoms period is characterized by so much instability which resulted in series of bloody conquest among the kingdoms.
The primary reason for widespread instability during this period can be linked to "A lack of central government or a strong emperor" to govern the kingdoms altogether.