Ludwig Wittgenstein
Ludwig Josef Johann Wittgenstein ( VIT-gən-s(h)tyne; Austrian German: [ˈluːdvɪç ˈjoːsɛf ˈjoːhan ˈvɪtɡn̩ʃtaɪn]; 26 April 1889 – 29 April 1951) was an Austro-British philosopher who worked in logic, philosophy of mathematics, philosophy of mind, and philosophy of language. Wittgenstein was born in Vienna into one of Europe's richest families.