A poll among some 400 american university and college philosophy teachers ranked it at number one in 1999; see. Lackey, Douglas P. (1999). „"What Are the Modern Classics? The Baruch Poll of Great Philosophy in the Twentieth Century"”. The Philosophical Forum. 30 (4): 329—346. doi:10.1111/0031-806X.00022.
Lackey, Douglas P. (1999). „What Are the Modern Classics? The Baruch Poll of Great Philosophy in the Twentieth Century”. The Philosophical Forum. 30 (4): 329—346. doi:10.1111/0031-806X.00022.
„Ludwig Wittgenstein or the Philosophy of Austere Lines”. Goethe Institute. Архивирано из оригинала 2. 3. 2011. г. „When his father died in 1913 and Ludwig inherited a considerable fortune... Then, after the First World War, in which he fought as a volunteer in the Austro-Hungarian army, he gave away his entire fortune to his brothers and sisters and, plagued by depression, sought refuge in Lower Austria, where he worked as a primary school teacher”
„Ludwig Wittgenstein or the Philosophy of Austere Lines”. Goethe Institute. Архивирано из оригинала 2. 3. 2011. г. „When his father died in 1913 and Ludwig inherited a considerable fortune... Then, after the First World War, in which he fought as a volunteer in the Austro-Hungarian army, he gave away his entire fortune to his brothers and sisters and, plagued by depression, sought refuge in Lower Austria, where he worked as a primary school teacher”