The Aegean Islands, which for centuries had been important ports on the trading routes, became the backwaters of this new transport network and the economies of several islands came close to collapse.
The new transport network benefited all of the Aegean Islands.
mnli hypothesis: The new transport network benefited all of the Aegean Islands. premise: The Aegean Islands, which for centuries had been important ports on the trading routes, became the backwaters of this new transport network and the economies of several islands came close to collapse.