We know enough developmental psych and human development stages in the social sciences to know that moral development occurs on a developmental continuum with successive stages that may or may NOT develop well for a myriad number of reasons....everything from early sexual abuse to autism and everything in between....

The notion that we are born gross sinners at birth on a downhill lie is simply not very helpful.

It may be the best the medieval folks could come up with and it may produce a useful fear that authoritarian religious types utilize..to promote their agendas... but it's neither true nor helpful to the development of morally adult folks...indeed it's destructive of those ends!