The roman era collapsed due to the roman empire being attacked by tribes such as goths and the vandals. THey burnt all the resources and moderfications that the Romans had built thus reuslting in the middle ages where they had no medicine, nothing that was to the Roman standards.
Hope this helped :)
Answered Sun 23rd September, 2012 @ 18:28 by Chloe-may
Thank you! That really helped :)
Answered Tue 25th September, 2012 @ 20:25 by Emily