@supermoonchrome
-No, that is not 21st century ideas of global trade. Interdepency already exist before that. Like ancient egypt make bronze tool with raw material from outisde it's border or Roman that trade their limited gold supply wiht spice from india.
-Also interracial marriage is exist since pre-history. Do you think different community just kill each other when they meet? No, of course not they also fuck each other. Let's take example Medieval Rus, nordic people intermarry with native slavic population or another example is Arab people intermarry with West African native in Medieval Mali. Heck, even greco-persian intermarriage is introduce by Alexander the Great after his conquest of persia.
-The trans one is kinda anachronistic but people with Dysphoria exist since ancient time. Real life example is Emperor Elagabalus. So it is kinda inaccurate but who can deny Cordelia having a dysphoria?
And lastly, There is exist billion of people in the past. There always a chance that a person or even a community at some point in time to have some believe or understanding that seem like anachronistic for modern historian. It is true we dont have any evidence to support that but we dont have evidence to reject that. Just because something/someone doesnt left some artifact or documentation doesnt mean that person/thing didnt exist. In my opinion because there is a posibility of anything we can fill it with anything and it is not even wrong. Until we have more evidence, i cannot value this manga anyless as a story that take place in Canute's era.
Edited because of typo.
Also i am not native english speaker, sorry for my error.