Biologism desribes the idea that the science of biology supplies the
means to exhaustively explain psychological processes. It has become
vastly popular in recent decades. Manfred Velden shows that this idea is
illusory on fundamental grounds. Several fields of inquiry are described
in which the biological project has demonstrably failed, such as, for
example, heritability estimates for mental traits like intelligence. It
is argued as well that biologism is just a further instance of an older,
more comprehensive and equally illusory concept: psychology as a natural
science (a science that produces generally accepted basic facts, for
example the creation of a psychological risk factor for coronary
disease). It is shown that psychology, masquerading as a natural
science, as it largely does, may create serious societal problems like
such as its misuse for racist purposes. The peculiar use of methodology
in psychology is also documented.