Mainstream economics treats altruism as ‘impure’. It looks at altruism in the paradigm of pursuing self-interest. Economists like Andreoni reason that altruism can be explained through the ‘warm glow’ effect. People feel good to help others as they gain personal and private comfort. They might be doing it because of social pressure, to gain fame, to improve social image, to exhibit status or to avoid the guilt of saying no to a cause in public. The paradigm of self-interest is neutral between a person’s decision to help others or to not help others.