I believe that personality/temperament is inherited. This actually goes along with the Biblical (Aristotlean) view that the living body IS you. For those who have been discussing resurrection the relationship between one's actual body and their personality is significant.
I recently uncovered this quote in my archives.
The Human Organism As A Person S. Howard Bartley Chilton Book Co.
Philadelphia 1967
At that time Bartley was Professor of Psychology, Director Laboratory for the
study of Vision & Related Sensory Processes at Mich. State University.
page 25 paragraph 3
"The description we need is one that is dictated, first, by the physicist's
description of the natural universe; and second, by the conventions of natural
science, and thus the true biologist's description of organisms as a part of
nature. When we start from any other origin to describe man as a person, we
end with something that is not acceptable for the purpose at hand, although not
necessarily "unreal" or "erroneous." No description of personality has as yet
met the criteria just stated, and so cannot be used as it stands. They typical
procedure of the usual theory builder is either to couch his language simply in
terms of human experiences, or in unique abstractions having nothing to do with
facts and ideas of natural science. In neither case is this what is needed
here."
Lists of traits seem to be endless. Some order has been made through
statistical analysis but there is still a need to be able to point to something
"big" in connection with organisms that can be measured that produces the super
traits that have emerged in this research.
Hope this isn't a thread killer