How do we know right from wrong and what does that say about us?

Selected Sources:

Rambam: Introduction to Avot, Chapter 6

Guide of the Perplexed 3:17

Rav Kook: Orot Hateshuva, Chapter 1

Rav Rabinovich: Natural Morality and Torah Morality in Mesilot Bilvavam

Dr. Jonathan Haidt: The Righteous Mind