the.com/temperament
The factory settings of your personality, shipped before you had any say.
means Your innate, stable emotional and behavioral tendencies — the disposition you're born with, before life edits it.
from From Latin temperamentum, meaning a proper mixing; medieval medicine blamed your mood on the blend of four bodily humors.
Four humorsSanguine, choleric, melancholic, phlegmatic — ancient personality types.
Not characterTemperament is given; character is what you build.
Visible earlyBabies show distinct temperaments within months of birth.