Here is an interesting article by Dennis Prager called Is There Really Only One Human Race?
I don’t agree with Dennis here, the Christian view of man’s nature is that none are good and all fall short of God’s glory. In order to understand the Bible’s teaching on the nature of man we need to identify two contexts in which the term good is used.
The first context is creation. When God created He declares his creation “good” and “very good”. Even after the fall man retains the image of God (Genesis 9:6). In that sense we can say that man retains his creative goodness. Yet sin has also broken into the creation, and so even here we are all born in sin. Sin has marred the good creation of God and so redemption is framed as re-creation. We are new creations in Christ.
The second context is the context of covenant. In terms of covenant we are “not good”. We are covenant breakers, all of us. No one is exempt from this covenant brokenness and it is here that we are in need of redemption.
This distinction is necessary for without it we logically slip into Gnostic heresy (body=evil; spirit=good).