Yaarel
🇮🇱 🇺🇦 He-Mage
For a different take, I use these humans in my campaign setting: http://homebrewery.naturalcrit.com/share/VJnO0-Ccx
This is partially because I give out 1 free feat at first level to everyone, and partially because I really don't like the jack-of-all-trades human, it makes humans too much of a default in the context of the world, I'd rather treat us as just another race with our own talents and flaws. It also adds another intelligence racial option, which is nice.
For the tone of a setting, I can see making the unmodified score the Human standard, and then granting a +1 a score because of cultural development.
Maybe even grant two +1's, one from the cultural environment, and the other from personal interest and aptitude.