They halted development in the mainland. That meant that England advanced far beyond the rest of Europe
Beneficial generally means good, so I would say the way people were able to learn from each other. Realistically, the only thing the crusades did was kill people.
<span>It survived for another thousand years in the eastern half of the Roman Empire. However, despite this relative longevity, Rome would never again reach the apex of power it had previously occupied, and eventually the Eastern Roman Empire would collapse, plunging Europe into the dark ages.</span>