But honestly, even if you're comparing to the richest kings of the time, your median modern person has a better life. People seriously underestimate just how much of our modern life would be unattainable luxury in the Medieval period.
And the question I always ask when people make this claim - now would you rather be a median modern person or one of the richest kings of the medieval era? It emphasizes that there's far more unquantifiables to having a good life than there are quantifiables, yet we almost entirely socially neglect them.
The study went something like this. Which do you prefer? 1. You earn $250k but all your friends earn $500k. 2. You earn $125k, but all your friends earn $75k.
It was more refined then that, but anyway: most people picked (2).
Imagine I give you a guaranteed $100k/year with the nuance that you're not allowed to earn any money beyond that, as the study implied that was your personal earnings. Where are you going to go live? In an area where most people are earning $200k or in an area where most people are earning $50k? It's the exact same question in effect, but now the phrasing makes it obvious that the choice is completely rational.
It's not about wanting to psychologically dominate your peers, but about making your money go further. If your friends are all earning twice what you do, then you're likely to struggle to afford even a decent house in a reasonable part of town. This logic breaks down at extremes of wealth, but $250k/year is nowhere near that point.
I might go with being one of the richer medieval kings, in the latter case. Global median is pretty bad.
Only things that might sway me otherwise are antibiotics and if we’re factoring in the whole “sword of Damocles” aspect for despotic rulers.
In modern times? The median personal income (US only) is $45k. [1] That's something that's very easy to forget, especially on a forum like this. And at that income, doing anything, besides accumulating meaningless gadgets, will be a challenge. Even having children, the most fundamentally critical responsibility for a society to sustain itself, is a challenge. I don't think the skyrocketing rates of psychological, mental, and other disorders is simply a coincidence.
We've created a dysfunctional and unsustainable society. This can still be quite a nice place when you're way above the median, but the median lifestyle is going to be quite unpleasant. It's certainly not a lifestyle I would ever even consider preferring over that of a medieval king.