Vance said:
There are a number of different approaches to this among those who accept theistic evolution. Here are three:
Good summary. I would also point out that the second and third approaches are not mutually exclusive.
I think there was a fall in the past and that we also each experience our own fall.
What distinguishes Adam (however defined) from us, is that Adam lived in a natural world untouched by sin. Yes, there was death, there was pain, there was suffering---but it was natural, not the consequence of moral agency or rebellion against God's will. So the original fall was an act against nature.
We, however, are born into a world of human society that is nowhere free from the touch of sin. We have no role model of human innocence. And that is true not only of every individual human we meet, but also of all human institutions in their collectivity: business, politics, educational systems, health care systems, welfare systems, and yes, religious institutions, are all built on a foundation of sin and propagate and support sinful behaviour. For us, to act sinfully, is to act in accordance with human nature and human society.
In a very real way, we are programmed by our socialization to be sinners. This, I believe, is the true meaning of "original sin" and the Calvinistic notion of "depravity" and the bondage of the will.
We cannot choose pure goodness, because our survival in a sinful world depends on choosing to sin. Sooner or later, we are all forced to compromise with the sinful society we live in, simply because we must live in the world. Some of us do so eagerly and willingly and see that as simple common sense. Some of us do so regretfully and with a heavy heart, but with a sense of lost innocence. But all of us are entangled in sinfulness from the time we have the capacity to choose good or evil.
That is why we need a redeemer. To set us free of our bondage to sin. It is also why the Incarnation is necessary. Jesus is our sole model of a human being untouched by sin. Fallen Adam, on the other hand, is incarnate in every one we see, including ourself.