The statement "The kingdom of Mali started to decline after the death of Mansa Musa" is **True**.
1. **Explanation:**
After the death of Mansa Musa in 1337, Mali faced a period of instability and internal struggles. The wealth and prestige that Mansa Musa had brought to the kingdom during his reign started to diminish. His successors were not as capable or powerful as he was, leading to a weakening of Mali's political and economic structures.
2. **Impact on Mali:**
The decline after Mansa Musa's death was significant as it weakened Mali's central authority, leading to regional revolts and the loss of control over various territories. This weakening of power contributed to the overall decline of the kingdom.
In conclusion, the decline of the kingdom of Mali did start after the death of Mansa Musa, as his strong leadership and influence were not effectively maintained by his successors, resulting in a period of instability and decline for the kingdom.
