Beginning of Essay
Self interest is a driving force; it is motivation. Motivation leads to progression and without progression early man would never have gotten past learning about fire. There is no single purpose of self-interest, it is for the individual to decide, but it is my m ....

Middle of Essay
.... I am motivated to participate in my hobbies like racing sailboats and driving cars. Bettering my life through self-enjoyment allows me to contribute in a more affective way to society. A person who has spent a weekend participating in their hobbies and passions will be much more relaxed than someone who has been working without any self-satisfaction. A relaxed person is a more productive person and productive people tend to give of themselves in society. Motivation towards self-enjoyment leads to an overall improvement in society. Without motivation would Einstein have had any reason to invent the theory of relativity? Self interest is the driv ....