Final answer:
The fall of the Roman Empire is attributed to factors including the capital's move to Constantinople, economic challenges, military defeats, political instability, and the spread of Christianity.
Step-by-step explanation:
Some historians pinpoint the downfall of the Roman Empire to a series of factors including political instability, economical decline, and military struggles. The relocation of the capital to Byzantium, known as Constantinople, is considered a crucial weakness for the West, with the Eastern Empire continuing until 1453. External pressures from barbarian invasions and internal conflicts such as the transition from paganism to Christianity under Emperor Constantine I contributed to a fragmented empire. Rome's fall can also be attributed to decreased tax revenues due to lost territories, which undermined the ability to sustain a robust military defense. Consequently, as leadership quality declined and threats increased, Rome experienced severe losses.