The most important factor for the decline of the Aksumite power was

a combination of factors including climate change, economic decline, and invasions from neighboring kingdoms such as the Zagwe dynasty and later the Muslim forces from the Arabian Peninsula. The loss of control over trade routes, particularly the Red Sea trade, also contributed to the decline of the Aksumite power. Additionally, the adoption of Christianity as the state religion, while it brought cultural and religious unity, may have also weakened the traditional sources of power and authority.

The most important factor for the decline of the Aksumite power was a combination of internal and external factors. Here is a step-by-step explanation of the decline of the Aksumite Empire:

1. Economic Decline: One significant factor was the decline in long-distance trade routes that had previously brought great wealth to Aksum. With the rise of Islamic powers in the 7th century, the trade routes shifted, bypassing Aksum and depriving the empire of its main source of income.

2. Rise of Islamic Powers: The emergence of Islamic powers in the neighboring regions posed a direct threat to Aksumite power. Muslim states such as the Rashidun Caliphate and later the Umayyad Caliphate expanded and conquered territories surrounding Aksum, weakening the empire's military and political standing.

3. Decline in Agricultural Productivity: The decline in trade also affected agricultural productivity. Aksum relied heavily on irrigation systems to support its agriculture, but as trade routes shifted away, maintenance of these systems became challenging. This led to a decline in agricultural productivity and ultimately food scarcity, impacting the empire's stability.

4. Religious Shift: The adoption of Christianity as the state religion was a crucial factor that contributed to the decline of Aksum. The empire's conversion to Christianity, while strengthening ties with the Byzantine Empire, created religious tension with neighboring Muslim communities. This strained the empire's political relations and weakened its position in geopolitical conflicts.

5. Political Instability: Internal power struggles, succession disputes, and regional revolts also played a significant role in weakening Aksum. Weakened by external pressures and internal conflicts, the empire gradually lost control over its provinces, leading to a fragmentation of power and a loss of central authority.

6. Migration and Conquest: Migration from the Arabian Peninsula and the arrival of new ethnic groups in the region further destabilized Aksum. The influx of new populations altered the demographic and cultural makeup of the empire, leading to social unrest and making it more vulnerable to external conquest.

Overall, the decline of the Aksumite Empire resulted from a combination of economic, political, religious, and external factors that weakened its position throughout the region.