Major concepts and discoveries in the treatment of mental illnesses are discussed in this book. The main focus is on the various background factors that govern the understanding of public attitudes, immigration, stigma, and competencies surrounding mental illness. Many etiological and pathogenic factors, commencing from adhesion molecules on one side, and concluding with abuse and maltreatment in children and youth on the other, are linked with mental illnesses, inclusive of personality disorders that lie between mental health and illness. The book makes an attempt to integrate theory and research data in understanding particular ways to deal with mental illness.