Someone kicked it Why Did Rome Fall? It's Time for New Answers

The Roman Empire stretched from Hadrian’s Wall to northern Iraq, and from the mouth of the Rhine to the Atlas Mountains of North Africa. It was the largest state that western Eurasia has ever seen. It was also extremely long-lived. Roman power prevailed over most of these domains for five hundred years -- and all this in a period where the speed of bureaucratic functioning and of military response rattled along at 45 kilometres a day, something like one tenth of modern counterparts. Measured in terms of how long it took real people to get places, the Roman Empire was arguably ten times as big as it appears from the map.