A recent cover story of Christianity Today discusses the historicity of Adam and Eve. The article does not include the following important points:
Jesus affirms the historicity of Adam and Eve and the Genesis account of their creation and marriage in Matthew 19:1-6.
Jesus own human ancestry is, moreover, traced directly to Adam by the Apostle Luke: 3:23-38
And, moreover, the divinely revealed doctrine of the Fall hinges in large part on the existence of a real Adam who truly sinned as the counterpart to the real Jesus who was/is truly righteous and who truly died and rose again:
Obviously Paul understood both Adam and Jesus to be historical figures. To suggest that Adam is a merely figurative character representative of humanity as a whole not only cuts against Paul's clear meaning, but it also destroys the argument of the text itself. The historical man Adam plunged humanity into sin and death through an historical sin. The historical man Jesus redeemed humanity through his historical death and resurrection. Take away the historicity of Adam and the parallel upon which the argument is built no longer works.