Bronfenbrenner (1977) synthesizes his original ideas presented to the American Psychologist Association and at a presidential address to the Division of Personality and Social Psychology (1974). Bronfenbrenner (1977) defines his own theories and model for others to reference for continued work on development of humans. The complex actions nested within each system he defined reflect the natural interactions of not only humans on development but also the environmental experiences that also mold us as humans. The work of Bronfenbrenner grew out of his first mentor in graduate school challenging him in his thoughts telling him specifically if he wants to understand something, he needs to try to change it. This is the basis of experimentation itself,
