The plague of Justinian plagues was a pandemic that afflicted the eastern Roman Empire especially its capital Constantinople the Sassanid empire and port cities around the entire Mediterranean Sea
How long it lasted was for 541 AD - 542 AD
One factor that led to the establishment of organized communities was simply the size of the migration movements, especially from the South, that required "grids" to be formed in many cities in the North.
Answer:
The public and legislators decide if government is needed to subsidize vital products, to ensure the safety of products or fairness in business practices (regulation). To provide the infrastructure in which businesses can operate.
Explanation:
One reason was the death of Jesus