My understanding is that a lot of banking was jewish simply because of their legal system. You could reasonably expect a jewish bank to obey a jewish court dec

My understanding is that a lot of banking was jewish simply because of their legal system. You could reasonably expect a jewish bank to obey a jewish court decision, even if that court was on another continent. This lent an otherwise unheard of level of credibility, and allowed jewish banks to network like no other.