The purpose of this chapter is to coordinate, develop, improve, plan for, and provide all services for persons of this state with mental illness, emotional disturbance, alcoholism, drug dependence, and an intellectual disability; to promote, safeguard and protect human dignity, social well-being and general welfare of these persons under the cohesive control of one (1) coordinating and responsible agency so that mental health and intellectual disability services and facilities may be uniformly provided more efficiently and economically to any resident of the State of Mississippi; and further to seek means for the prevention of these disabilities.