Re: Conflicting Time Periods
I'm assuming magic would help equalise the conflicts.
However, there needs to be a very convincing reason why such disparate cultures have evolved on a single world. Geographical isolation is a cause of course, but if both cultures are fairly large and one has airships - well, they would definitely have stumbled upon the other culture sooner or later. Maybe that is what the story would best be about? Otherwise it seems very unconvincing to me.
(Should this go in the writer's forum, btw?)