Talk about the three G's; Gold, Glory, and God.
Also, at the time, land was equal to power. The more land you had, the richer you were. This is a social and political reason, as well as economic.
Hope this helps you. Ask any questions if you need to!
I pretty sure It cuold be the " Protecting human rights"
Answer:
They found silk and other resources in Asia during the crusades
Explanation:
they claimed that without slaves the economy would collapse I think, I'm not quite sure if I'm remembering correctly though
