Why did the Kalmar Union and Denmark-Norway Collapse?

Why did the Kalmar Union and Denmark-Norway Collapse? Despite each having their own cultures and people, and now being entirely independent of each other, the three Nordic nations, in particular, have a curiously intertwined history. But why exactly did they end up united? What happened to the Kalmar Union that would eventually be succeeded by Denmark-Norway? And why would Denmark-Norway eventually collapse?... ♦Consider supporting the Channel : https://www.patreon.com/Knowledgia ♦Please consider to SUBSCRIBE: https://goo.gl/YJNqek ♦Music by Epidemic Sound ♦Script & Research : Skylar J. Gordon #History #Documentary