Is there a role for culture and/or ethnicity in the inferiority complex?

The world has changed quite a bit since Alfred Adler theorized about the “inferiority complex.” What are the issues today that lead children to have an inferiority complex? In other words, what challenges do children face that make them feel that others are always better than them? Is there a role for culture and/or ethnicity in the inferiority complex? What is the relationship between an inferiority complex and self-esteem?