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.
The doctors and nurses who have risked their lives to treat patients have defied these explanations and proved that altruism can be genuine. The idea of selfish self-interest needs revision. John Nash gave the idea that everybody does what’s best for him and the group. Referring to humans as a group, Dawkins think that Selfish Gene has no inherent morals and only has survival instincts. Morality is then just an instrument to achieve survival of the fittest.