Book excerpt: Founding a startup is a challenging endeavor that works best in a well-balanced team. Different thinking styles are needed throughout the founding journey. Archetypes are deeply engrained templates in the collective unconscious and can be used to reveal the hidden aspects of social interactions within teams. This book employs an archetypical personality test to uncover the eight most significant team roles needed in a startup: the leader, the mentor, the artist, the friend, the hero, the femme fatale, the rebel and the manager. The artist, for example, always finds unconventional solutions, the femme fatale attracts support for the idea, and the hero is undaunted in the face of setbacks. Archetypical roles can manifest in individuals or at the group level, and they can and should change throughout the journey. With the included personality test, this book offers entrepreneurs, investors and mentors alike a tool to improve the interpersonal processes in startup teams.