Advancement of the Human Species

1 Corinthians 15:46 Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual.

First comes the natural body (our bodies in this world). Then comes the spiritual body (our bodies in the world to come).

The secular doctrine of evolution is completely false but at least in one thing (survival of the fittest) they touched on a certain Biblical truth. It is easy to see that God's plan in the resurrection for His elect people does bring a progression from an inferior natural body (that perishes) to the superior spiritual body (which will live forever) as a genuine advancement of the human species.