Why did Western Europe develop its own resources during the Middle Ages?

During the Middle Ages, Western Europe developed its own resources primarily due to the decline of trade routes that were once robust during the Roman Empire, leading to increased self-sufficiency. The feudal system encouraged localized agriculture and the exploitation of nearby resources as communities sought to sustain themselves amidst political fragmentation and frequent invasions. Additionally, the rise of manorialism fostered a reliance on local production, reducing dependency on long-distance trade and prompting innovations in farming and craftsmanship. This shift laid the groundwork for economic and social structures that would eventually contribute to the Renaissance.