Why did the Eastern Roman Empire survive after the Western Roman Empire fell?

The survival of the Eastern Roman Empire, which continued as the Byzantine Empire until 1453, while the Western Roman Empire collapsed in 476, was due to several key economic, social, and strategic advantages.12

• Economic Strength: The East was significantly wealthier, benefiting from lucrative trade routes and stable agricultural production in provinces like Egypt and Syria. While the West suffered from economic hardship and inflation, the East maintained a robust monetary economy and a reliable gold currency, the solidus.2345
• Manpower and Administration: Eastern emperors maintained better control over their resources and manpower. Unlike in the West, where a powerful landed aristocracy often shielded rural populations from military and tax obligations, the Eastern state successfully retained access to its tax base and soldiers.4
• Strategic Capital: The relocation of the imperial capital to Constantinople in 330 provided a highly defensible and strategically located center of power. Its location allowed the empire to better manage threats and maintain administrative cohesion.653
• Demographic Stability: Throughout the 5th century, the Eastern provinces generally maintained higher population levels and preserved urban civilization, which helped the state remain resilient against the external pressures that overwhelmed the West.43