Psychology’s past in Eastern civilizations were an inherent part of the religious and moral philosophies. In an overview of those non-Western traditions in psychology, points of interaction between East and West occurred in Persia, which served as a crossroad between India and the Arab world. Ancient Indian culture followed the traditions of Buddhism and Hinduism. The writings of the Vedas, especially the Upanishads, provided the foundation for Hindu philosophy. In China, imported Buddhism taught that self-denial and proper thinking were necessary to achieve well-being. However, the older philosophical movement of Confucianism offered a stronger basis for Chinese intellectual progress. Both Buddhism and Confucianism were exported to Japan, where they were transposed into Japanese philosophies to support nationalistic aspirations. Two Middle Eastern cultures, Egyptian and Hebrew, are important as predecessors for the ancient Greeks whose philosophical formulations would provide the foundations for the emergence of psychology. Egyptian achievements in art and architecture left us a legacy, especially expressed in astronomy and medicine. The Jewish foundation of monotheism and law, along with an understanding of the person as a unity of spirit and matter, interfaced with the Greek culture that was to dominate the Mediterranean world.

The intellectual excitement of nineteenth-century Germany was reflected by the Romantic and Existential movements, although both had international aspects as well. Both movements were to some extent reactions against the dominant idealism of rationalism, coming primarily from Kant’s views on the active mind, constructing reality. Fichte, von Schelling, and Hegel explored the implication of Kant’s philosophy, with Hegel coming to dominate the age. Romanticism found its roots in Jean-Jacques Rousseau, and exerted tremendous influence in art, literature as well as philosophy, particularly in the first half of the nineteenth century. Recognizing the complexities of human experience, particularly in the dimensions of emotions, passions and desires, romanticism explored those aspects not readily explained by rational, intellectual processes. Existentialism was a direct reaction against rationalism and found initial expression in the nineteenth century by Kierkegaard, in Theology, and Dilthey, in psychology. Further, the Kantian notions of the strivings of the will and the unconscious were explored more fully by Schopenhauer and von Hartmann.

Gestalt psychology originated as a German intellectual movement heavily influenced by the precedents of the Würzburg school and phenomenological approaches to science. The early Gestaltists directly challenged Wundt’s structural psychology and were largely successful in pursuing the traditions of Brentano and Stumpf. Originating in Wertheimer’s research on apparent movement, or the phi phenomenon, the Gestalt principles were founded on the assumption of the inherent organization of person-environment interactions. The writings of Köhler and Koffka expanded the perceptual basis to formulate a comprehensive system of psychology especially amenable to higher thought processes of insight, understanding, and productive thinking. When the movement was threatened with destruction by the intellectual sterility of Nazi tyranny, the leaders fled to America. Unfortunately, the Gestalt movement was out of tune with the prevailing behavioristic character of American psychology. However, the Gestaltists assumed an important role in broadening the basis of behaviorism to foster a complete view of learning processes. One application of Gestalt views, contained in Lewin’s field theory, met with success in providing an empirical model of personality and social activities. The Gestalt movement, although it did not retain a separate identity, contributed greatly to the reformulation of psychology.

Ancient Greece provided the setting for the first detailed, recorded hypotheses about the causes of human activity. In the search for first principles of life, tentative explanations included: The naturalistic orientation of the Ionian physicists Democritus, Heraclitus, and Parmenides looked to some basic physical element in nature as this first principle. A biological orientation, developed by Alcmaeon, Hippocrates, and Empedocles, held that bodily physiology is the key. Pythagoras held that life is transcendent of the material world and found in the essential coherence of mathematical relationships. The Sophists posited a pragmatic orientation that denied the value of trying to seek out first principles, relying instead on observations of life as it is lived. Finally, Anaxagoras and Socrates, rejecting the Sophists, proposed the existence of a soul that defines humanity. This humanistic orientation developed the notion of the spiritual soul that possesses the unique human capabilities of the intellect and the will. The soul was elaborated as the central element in the interpretation of life offered by Plato and Aristotle. By the end of the Greek era the critical themes and issues of psychology as well as the methodological approaches were well identified and structured.

The chapters of Part I will discuss why complexity science is important, how this science relates to other sciences and also a little bit about its philosophical status. The aim is to make clear what makes complexity science special and in which way it contributes to our understanding of the surrounding world.

As psychology emerged as a discipline in the nineteenth century, advances were made in the understanding of the nervous system. The specific functions of nerve fibers were described by Bell and Magendie. Müller’s analysis of neural conduction led Du Bois-Reymond and Helmholtz to describe the nerve impulse. As a reaction against Gall’s phrenology, localization of brain functions reached systematic description by Flourens and Sherrington. Concurrently, advances in physics led to experimental studies of sensations by Young, Helmholtz, and Müller, while Purkinje justified subjective sensory experience. The second intellectual backdrop to psychology was psychophysics, which proposed that sensory experience is not completely reducible to physics and physiology. Although Weber contributed both methodologically and substantively to psychophysics, its clearest expression is found in the quantitative analysis of Fechner. His work received strong support from the experiments of Helmholtz, especially in his doctrine of unconscious inference in perception. The final movement was centered on Darwin’s theory of evolution by natural selection, which completed the Copernican revolution in science and established the primacy of scientific empiricism. Spencer applied Darwin’s writings to evolutionary associationism, and Galton made an intensive examination of individual differences through mental testing. All three movements demonstrated the efficacy of empirical science.

Many types of emergence exist. This chapter will discuss some of the most prominent, and broadly occurring, examples of emergent structure in space and time.

We discuss high and low-dimensional, as well as stationary and non-stationary, mathematical formalisms leading to intermittent dynamics.

The excitement of cognitive psychology as a viable paradigm for contemporary research and application developed from a number of trends deeply imbedded in psychology’s past. In the twentieth century, these influences were clearly evident among the functionalists, the Gestalt movement, Tolman’s purposive behaviorism, as well as in the extended subfields of psychology, such as developmental, social, personality and clinical. In the latter part of the twentieth century, such specified advances as Bartlett’s schema theory, Hebb’s neural networks, and Broadbent’s filter model of attention provided cognitive psychology with substantive direction. The question of artificial intelligence contributed to a paradigm shift through the efforts of pioneers such as Turing and the logical theorist studies of Newell, Shaw and Simon, leading to what is described by some as the cognitive revolution. The seminal research of George Miller, Jerome Bruner, and Ulric Neisser gave cognitive science its form and substance. The question of the sustainability of the cognitive paradigm remains a topic for reflection.

The theme of the essential activity of the mind provided the exciting intellectual setting that made a compelling case for psychology’s founding, and also gave rise to competing models of psychology. Structural or content psychology, championed by Wundt and Titchener, defined psychology as the experimental study of the data of immediate experience through the method of trained introspection. This natural science model sought to reduce the contents of consciousness to constituent elements of sensory origin. The restricted definition and ambiguous methodology led to challenges. Nevertheless, structural psychology secured recognition of psychology as a science, and Müller, Hering, and Ebbinghaus, attempted to modify structural psychology. Additionally, Mach and Avenarius bolstered the justification for psychology as a natural science. An alternative, described as a human science model, proposed more open definition and methodologies. Brentano’s act psychology stated that the phenomenological processes of psychological events are inseparable from the environment and consciousness. The works of Stumpf, Külpe, Dilthey and Bergson all fall into the human science model, but the lack of systematic theory reduced their successful competition with structural psychology. In many respects, the “founding” of modern psychology was a false beginning, and neither model established a lasting framework for psychology.

The subject matter of complexity science will be identified and placed in a historical perspective.