What change in Byzantine life resulted from the loss of the Balkans to the Slavs?

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The loss of the Balkans to the Slavs resulted in the decline of urban life in the Byzantine empire as many cities were either destroyed or abandoned. The Slavs were not as urbanized as the Byzantines and did not have the same economic and cultural values. Therefore, the loss of the Balkans to the Slavs had a negative impact on the urban life in Byzantine Empire.

What Change in Byzantine Life Resulted from the Loss of the Balkans