Entertaiment is a broad term that can mean different things to different people. What is entertaining for one may be deemed cruel for another. Entertainment can bring joy, stimulate learning and even have positive impacts on society when properly regulated. However, it can also have negative effects when not regulated. Entertaiment often hits on points that the brain was evolved to deeply react to, such as social backstabbing and murders. [3]
Merriam-Webster Online Dictionary.