If much of the investigation here summarised has only proved the obvious, the obvious is worth proving when this can be done. And if the relative importance of selection and mutation is obvious, it has certainly not always been recognised as such.
Our ancestors were mostly rather rare creatures.
If human evolution is to continue along the same lines as in the past, it will probably involve a still greater prolongation of childhood and retardation of maturity. Some of the characters distinguishing adult man will be lost. It was not an embryologist or palaeontologist who said, "Except ye… become as little children, ye shall not enter into the kingdom of heaven."
Another possible mode of making rapid evolutionary jumps is by hybridisation.
