Abstract

Irrational thinking, religious fundamentalism, cults, magical beliefs and esoteric themes increasingly dominate western public life and philosophical debates, while rationality and logical thinking is continuously and increasingly being vilified. This has led to a state of utmost helplessness, when dealing with claims of (religious) fundamentalism and illegitimate metaphysics of power, while conversely the day-to-day living environment remains highly technical and positivistic. Puzzled by this increasing division, this book tries to elucidate: The emergence of the concept “irrational”, after Kant’s Critique of Pure Reason and the metamorphosis from its origins at the end of the 18th century into the 20th century. The methodical consequences of the Copernican revolution, which split off domains of the individual such as the body, nature, singularities, coincidence, will, life or the soul (which had been recognized as an organic compartment of the individual) as representations, converting them into new and dynamic elements for post-Kantian philosophies: body – Nietzsche, will – Schopenhauer, life – Lebensphilosophie, singularity/coincidence – existentialism, nature – romanticism, soul – early psychoanalysis etc. Finally, criteria for irrational philosophies are being presented.