- Pthahotep, whose writings in 2500 BCE included a consideration of character.
- Theophrastus, who took over from Aristotle and studied types of personality.
- Thomas Hobbes who was responsible for initiating the narrative “we are all equal.”
- A teacher of yoga. Although Hindu and Buddhist traditions teach that we share a universal inner communality, they also recognize differences in their students, and that different students could learn best from different regimens of teaching.