what were economic,social and political effects of the crusades?

Answer 1

The crusades got back to their lands the Greek treasures of the East! They learn to read and write. They started, though, the everlasting Christian - Muslim conflict. Also, they tried to destroy what took them from the caves and forests into cities: the Greek civilization! Further, they permanently weaken the Eastern Roman Empire (the so called Byzantine Empire) resulting in the sovereignty of Ottomans and other nations from middle Asia, the Russian steps, etc., who change the biological map of Europe!