Two identical brothers

Two identical brothers were raised in the same household by parents who strive to treat them equally. One brother grows up to be a successful attorney and the other grows up to be an unemployed petty criminal. in their senior years, the prosperous citizen enjoys tranquil aging with his family and grandchildren while the other dies in despair years earlier. How might a psychologist begin to address this paradox? how do you think Kohlberg, Erikson, Piaget and other development psychologists explain this issue?