Popper’s theory of World 3 is often regarded as incongruent with his defense of methodological individualism. This article criticizes this widespread view. Methodological individualism is said to be at odds with three crucial assumptions of the theory of World 3: the impossibility of reducing World 3 to subjective mental states because it exists objectively, the view that the mental functions cannot be explained by assuming that individuals are isolated atoms, and the idea that World 3 has causal power and influences (...) both individual minds and actions. This article demonstrates that the inconsistency thesis stems from a confusion between methodological individualism as understood by Popper and reductionism. The reasons for this confusion are analyzed and clarified. It is argued that two variants of methodological individualism can be distinguished, and that unlike psychologistic individualism, Popper’s nonatomistic individualism is fully consistent with his theory of World 3. (shrink)

Even though social engineering has gained a bad reputation, due to new possibilities in the information age, it may be time to reconsider Karl Popper’s conception of “piecemeal social engineering.” Piecemeal social engineering is not only an element within Popper’s open society. It also connects his political philosophy to his philosophy of science and his evolutionary epistemology. Furthermore, it seems to fit well into the search for implementation strategies for policies and social actions in the context of nonideal theory. Nevertheless, (...) this does not necessarily undermine the need for political ideals and first-order principles, which are inhabitants of “World 3.”. (shrink)

The paper is an overview of the connections between scientific psychology and religion. The thesis that scientific psychology, which deals with empirical research of all manifestations of spirituality and religiousness within the different principles and contexts of culture, cannot refer to the doctrine of religion, but it should take into account in its research the cultural aspects of the religion without valuing them at the individual human level and their influence on the "fate" of the world, is being discussed. Conclusion: (...) Against the background of the twentieth-century Anglo-Saxon psychology, based on the positivist paradigm, there is no place on the basis of valid methodological canons for building a direct relationship between scientific psychology and religion. (shrink)