Final answer:
The major problems in the study of Ethiopian history include invasions, internal conflicts, environmental challenges, and the scarcity of historical records.
Step-by-step explanation:
The major problems in the study of Ethiopian history include internal conflicts, invasions from neighboring regions, environmental issues, and a lack of historical records. One major problem was the invasion by the Muslim Sultanate of Adal in the mid-Solomonic period, which led to the destruction of churches and Christian works of art. Additionally, the conversion to Catholicism by Emperor Susenyos caused a civil war as his subjects resisted the religious beliefs enforced by Jesuit missionaries. Soil erosion and rebellion by groups like the Beja peoples also contributed to the decline of the Aksumite Kingdom. Furthermore, the decline of the Kingdom of Aksum was influenced by factors such as the Arab expansion into Northern Africa, depletion of natural resources, and disruption of trade routes.
Another major problem in Ethiopian history was the period of Communist rule in the 20th century, which was marked by uprisings, coups, devastating droughts, and famine that caused the deaths of millions of people.
In conclusion, the major problems in the study of Ethiopian history include invasions, internal conflicts, environmental challenges, and the scarcity of historical records. These factors have shaped the course of Ethiopian history and contribute to the complexity of understanding the country's past.