The soul is incorporeal and eternal, pre-existing the body. Speaks of hierarchically ordered powers of the soul, ranging from growth and reproduction up to imagination and the higher senses. If it is quasi-physical, we should be able to measure it using scientific methods. Mental events cause mental events but there is an appearance of causal interaction between mental and physical due to God intervening either at the beginning or constantly. The conscious mental life is a byproduct of physical processes in the brain.
Biology seems to indicate a continuity of forms leading to man.
Genetic problems Suggestion that there may not be any genes that are unique to humans. After resurrection I will still be 'I' but in a different body and a new kind of existence. Position affects ideas on abortion, treatment of animals, emphasis on saving souls or caring for people's physical needs.