Ludwig Wittgenstein

Ludwig Josef Johann Wittgenstein (IPA: ) (April 26, 1889 in Vienna, Austria – April 29, 1951 in Cambridge, England) was an Austrian philosopher who contributed several ground-breaking ideas to philosophy, primarily in the foundations of logic, the philosophy of mathematics, the philosophy of language, and the philosophy of mind. His influence has been wide-ranging, placing him among the most significant philosophers of the 20th century.