Christiansen has become known as a "master of self-improvement and human-needs psychology" and has traveled across the world to study human potential.
She traveled across the world to study human potential. Christiansen has become known as a master of self-improvement and human-needs psychology.
Christiansen has become known as a master of self-improvement and human-needs psychology. She traveled across the world to study human potential.
Christiansen has become known as a master of self-improvement and human-needs psychology. She traveled across the world to study human potential.