There’s that study that found Italian families who were wealthy during the renaissance are still wealthy.

Sweden had a very powerful monarchy (the dominant Baltic power at one point) and an aristocracy but never a revolution. I’d expect a lot of wealth inequality based on inherited wealth.

A number of articles and at least one well-known study have been published highlighting the fact that the ranks of the wealthiest landowning families in Britain are nearly unchanged since Norman times — e.g. https://www.medievalists.net/2014/11/englands-1-remained-sin...

The British wealth inequality in these rankings was probably delegated to overseas territories in the Caribbean.

it’s absolutely insane that the brits never did land reform or seemingly have any interest in it

Considering the fact that the royal family owns an astounding amount of real estate, it doesn’t surprise me at all.

Sweden's wealth inequality was initiated by Thirty Years' War and The Deluge and then only accumulated not impacted by any violent revolution or brutal invasion.

The Deluge didn't cause wealth inequality in Sweden. Some military leaders were, during Swedish wars, rewarded with increased land holdings, but these were later reduced. Sweden's wealth was also created late. Sweden was a poor country until the early 1900eds.