Critique of the Kantian philosophy
"Critique of the Kantian philosophy" is a criticism Arthur Schopenhauer appended to the first volume of his "The World as Will and Representation" (1818). He wanted to show Immanuel Kant's errors so that Kant's merits would be appreciated and his achievements furthered.
Theodor Birt
When Birt was a professor in classics at Marburg University, its philosophy department was among the most important in Europe. Hermann Cohen and Paul Natorp there developed what came to be known as Neo-Kantianism. As the name suggests, this aimed to develop Kant's philosophy and apply it to a wide range of contemporary issues. In addition to Cohen and Natorp, Marburg's philosophy department was home during Birt's career to such important figures as Martin Heidegger, Hannah Arendt, Paul Friedlander, Ernst Cassirer, and José Ortega y Gasset. Birt contributed a section to one of Natorp's books, who thanked him as a 'great friend and colleague.' A letter from Kurt Wolff, who became a well-known German publisher, to the writer Boris Pasternak shows that Birt and the philosophers were part of the same social circle: