Joseph Strayer, Western Europe in the Middle Ages (1955)
“ Men who could not make a decent living after honest effort, men who saw their standard of living and their social status steadily diminishing, could not be expected to be very much interested in preserving a civilization which had ruined them. And yet the Empire included the richest regions and the most fertile lands of the ancient world. If Greece could prosper when it had been divided into dozens of petty states, if Spain and Gaul could attract traders when all land and sea routes were dangerous, why should the union of these lands with many others produce a depression instead of a boom? ”
