Augustine

(354-430) Wrote Confessions (397, 398). Believed we're all sinners and that sin is apparent because of the death of infants.
Effect of the Fall - Caused a defect in all humanity and all
of creation.
Hereditary Sin - Sin nature and guilt inherited by Adam's progeny (through the sperm??).
Humans at Birth - Sinners incapable of not sinning.
Humanity's Will - Spontaneous freedom.
Fact of Universal Sin - Proof of sin nature.
Turning to God in Salvation - Grace is required to overcome sin nature.