Basic Human Intelligence has not changed for many thousands of years; Humans may be more successful now due to improved data storage, but that is an add on, it helps use intelligence better.
People can and do confuse intelligence with knowledge but that normally just shows poor education.
And to think they are brighter than people walking about 10 or 20 thousand years ago just means they not as bright as they think they are.
At the moment humans look to have gone unchanged for 276,000 years and that date is always being pushed back.
And no of course people are not equal in intelligence but that does not mean they can’t improve by making better use of what they have.
Are there racial differences in levels of intelligence? .. Yes but it is normally not talked about as for some reason it can upset some of the dumber racial groups.
Swapping bodies with a young female demon had not been part of the planned vacation.
Nor was having to attend a demonic high school for the magically gifted.
When the most magical thing you could do was set your own underwear on fire.
Life was not going to be easy, even less so with a painful tail that everyone trod on.
Owning a magic sword that always tried to look up your skirt when fighting was not helpful.
But then nor was having a telepathic diary that corrected your thinking instead of your spelling.
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