Selfishness is the most boring of traits a developed civilization can offer. It is a direct cause of demagoguery prevalent in western societies. Particularly the Untied States. Only relative comfort and wealth could afford time to steep such a devious plague on humanity. It is the root of all injustice; all war; all acts of violence on this planet. The most curious thing about selfishness is that these facts can be known by its purveyors. Those that claim antipathy to it. Yet the disruption of these standards is enough to trigger (in these lesser of human beings) some innate or even instinctual irrationalization that they are the only ones who matter. That they are the keepers of freedom and that others are trying to take it away from them.
Selfishness offers nothing to enlighten or progress societies. It is only a cheap exposition of unthinking, types with terrible ramifications.