A decline in industrialization
It's called deindustrialization
        
             
        
        
        
First impressions are said to be lasting impressions, and indeed, it is remarkable how soon the New World "that was never before known to anyone" was viewed as a land of wealth, promise, and opportunity
        
             
        
        
        
Hey there 
 
There were many ways the collapse of Western Roman Empire influenced Justinian's reign. The best way it influenced Justinian's reign was it ruined the economy. 
Hope this helps