Why did the call for the First Crusade to liberate the Holy Land come at the end of the eleventh century, and not after the Muslim conquest in the seventy century?

by deMohac

Was there something different in the western European society and in the western Church of the late eleventh century, compared with the mid seventh century, that helps explain why the call for a crusade was successful at that time?

saintplasticcups

This is an interesting question. Are you looking for the religious, economic or social reason?