Equality, or treating people as equals, is a common theme in spiritual literature and is an example of Right Action.
"...Sufism abolishes all invidious class distinctions.
surely the noblest among you in the sight of Allah is he who is the most righteous of you...
sounds a death-knell to all superiority or inferiority based on rigid caste and social distinctions. Mankins is but a family, according to the Koran..."
- Ali Shah Ikbal, Islamic Sufism (Tractus Books, 2000). p. 69.