Here in his famous 1921 Psychological Types (Psychologische Typen) Jung elaborates on the differences in fundamental psychological orientations among individuals. According to Jung, these orientations define how individuals perceive the world and make decisions. The core of this theory revolves around two Kantian Antinomies: Attitude and Function types.

This edition contains a new 2023 translation from the original German manuscript with an Afterword by the Translator, a philosophic index of Jung's terminology and a timeline of his life and works.