The competing theories in the psychoanalytic marketplace today should be ju
dged on their merits, not on the basis of the authority of whoever first pr
oposed them. What is valid in each theory should be included in any formula
tion of a psychoanalytic theory of mental development and functioning: Sinc
e psychoanalysis, as part of psychology, is a branch of natural science, pl
uralism in theory is to be avoided in psychoanalysis as in every branch of
science. The psychoanalytic method is a valid one Of Studying a particular
aspect of brain functioning. The method and the theories based upon it are
as "organic" as is the case with any of the other neurosciences. Any valid
psychoanalytic theory of mental functioning and development should include
the following conclusions: (1) Unconscious mental processes are omnipresent
and of great importance in mental functioning; (2) Thoughts are as causall
y related to one another as are other events in the universe; (3) Mental fu
nctioning is a developmental phenomenon with describable, sequential featur
es; and (4) A major rob in mental functioning and development is played by
conflicts over the sexual and aggressive wishes that characterize mental li
fe during the period from three to six years of age, and by the compromise
formations that result from those conflicts.
The last of these conclusions, though disputed by many, is abundantly suppo
rted by evidence that is not dependent on the use of the psychoanalytic met
hod, as well as by evidence furnished by the use of the psychoanalytic,tic
method. There is also much evidence to support the assertion that any psych
oanalytic theory that attributes language-dependent thoughts to a child who
se brain is not yet mature enough to be capable of language is to be consid
ered invalid, as are any observations made by the psychoanalytic method (=
clinical observations) that are influenced by such art invalid theory. In p
sychoanalysis, as in every other branch of science, an observer-no matter h
ow astute and how experienced-who subscribes to an invalid theory will be l
ed astray by that theory, sooner or later; in one way or another.