Alois Riehl
modernNeo-Kantianism, Critical Realism1844 – 1924
Alois Riehl (1844–1924) was an Austrian-German philosopher and leading figure in the realist wing of neo-Kantianism. He developed a form of critical realism that sought to reconcile Kantian epistemology with scientific empiricism, arguing that things-in-themselves are causally real even if unknowable in their intrinsic nature. His multi-volume work *Der philosophische Kritizismus* established him as a systematic defender of critical philosophy against both idealism and naive realism.
Notable Achievements
1
Authored Der philosophische Kritizismus (3 vols., 1876–1887), the definitive neo-Kantian critical realist system
2
Distinguished the realist wing of neo-Kantianism from the idealist Marburg and Southwest schools
3
Defended a causal theory of perception compatible with scientific naturalism
4
Held chairs at Graz, Kiel, Freiburg, and Berlin, shaping German academic philosophy across generations
5
Advanced a methodological distinction between philosophy and natural science that influenced later analytic epistemology