I want to know the answer to the following question:
What year marked the onset of the Crusades?
All the background I'm provided with is that "Over this period of several hundred years, some have suggested, Jewish economic activity was focused on trade, business management, and financial services, due to several presumed factors: Christian European prohibitions restricting certain activities by Jews, preventing certain financial activities (such as "usurious" loans) between Christians, high rates of literacy, near universal male education, and ability of merchants to rely upon and trust family members living in different regions and countries.". Is that enough to answer the question?
Answer: no