Schlick took the role of the head of Philosophy field at Vienna University and, similar to their predecessors Ernst Mach and Ludwig Boltzmann and had serious doubts about the philosophy based on metaphysics. He tried to present evidence for the key points he elaborated for his work. He established the Vienna Circle with other companions like Rudolf and Neurath, a meeting to discuss philosophical horizons, away of the metaphysical and focused on empiricism. Under the authority of other great people in this field such as Wittgenstein and Russell, the circle pushed the beginning of positivism based on ...