I've heard the following definition of morality:
A particular action or choice is moral or right if it somehow promotes happiness, well being or health, or it somehow minimizes unnecessary harm or suffering, or both.
A particular action or choice is immoral or wrong if it somehow diminishes happiness, well being or health, or it somehow causes unnecessary harm or suffering, or both.
Is this definition proposed by any known philosophers/schools of philosophy, or it's an original?