According to the article one of the most significant principles of MST is the amalgamation of empirically-based treatment approaches including behavioral parent training and strategic and functional family therapy approaches. The article explains from a historical perspective these approaches only focused on a small aspect of the youth’s social ecology including such factors as problem-solving skills and the discipline the parents. These factors were placed in an ecological paradigm confronting important factors involving family, peer, school, and community systems. In addition biological contributors were taken into consideration to recognize problems and psychopharmacological treatments that should be utilized in combination with psychological treatments.