“A sigma male is a man within the socio-sexual hierarchy who chooses to live his life outside of society’s normal social dominance hierarchy structures. Sigma males share many traits in common with the alpha archetype. However, their tendency to walk outside of traditional social dominance hierarchies sets them apart and makes them different.”
Mitth’raw’nuruodo, or Thrawn, who became a grand admiral in the Galactic Empire, left his home system, Chiss Ascendancy, to pursue his life in “lesser space” humans.
Thrawn was labeled as a Sigma Male.