M.M. grew up in an inner-city neighborhood in Boston. While in utero, M.M. experienced fetal distress while exposed to crack cocaine. As an adolescent, his mother was repeatedly incarcerated due to drug use. Because M.M. never knew his father, he ­transitioned in and out of foster homes, and at times, found himself homeless. Growing up, he also frequently witnessed street crime. Unsurprisingly, M.M. suffered episodic ­depression throughout his youth. Even though M.M. was ultimately provided...