 Considered by some to be the greatest philosopher of the 20th century, Ludwig Wittgenstein played a central, if controversial, role in mid-20th-century analytic philosophy. He continues to influence, and incur debate in, current philosophical thought in topics as diverse as logic and language, perception and intention, ethics and religion, aesthetics and culture, and even political thought. Furthermore, a central factor in investigating Wittgenstein’s works is the multifarious nature of the project of interpreting them; this leads to untold difficulties in the ascertainment of his philosophical substance and method.