No - we would have never survived as a species if we were selfish
That ‘evil’ is a learned/socialized response stemming from the many factors that went into play allowing us to horde resources
No.
Not only do I disagree, I rebuke the assertion.
Selfishness is an evolutionary advantage that has survived because it is the most fit for this world. We joined into groups for selfish reasons, to help ourselves survive, not to help others survive.