dhw: If we believe in common descent, speciation may have taken place through an autonomous inventive mechanism (AIM) or complexification mechanism (CM) within the cell communities. If God exists, he would have provided the mechanism, and may have dabbled to correct problems. Alternatively, he may have guided evolution all the way. The latter hypothesis is not as compatible as an AIM or CM with the higgledy-piggledy bush of life. - I agree.