when i read this question i thought of "positive psychology" the study of the more positive aspects of the human experience, as opposed to psychosis and whatnot. for example, what traits make a person persevere in the face of harsh times? or why are some people more resilient to periods of depression? or the study of how happiness can extend your life expectancy. or how about the power of love (or companionship or laughter) helping to overcome sickness or again, extend life? not sure if this is what you meant though.