What is an emotion? Is love just a feeling? Are our emotions irrational? What is life? Is it better to have choices? Does God actually exist? If yes, then why is there so much evil? Are you propounded by such philosophical questions in your mind? If yes, then your mind and heart surely takes a philosophical route whenever free. Philosophy is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language. First termed by Pythagoras, philosophy encompasses a huge body of knowledge. From the time of Ancient Greek philosopher Aristotle to the 19th century ‘natural philosophy’, there has been a phenomenal growth in the subject. In the 20th century, philosophy increasingly became professionalized as the period witnessed the development of a number of new philosophical schools including logical positivism, analytic philosophy, phenomenology, existentialism, and post-structuralism. Interestingly, the philosophy of the 20th century is known as contemporary philosophy. The era saw some of greatest minds at work in the field of philosophy starting from Bertrand Russell, Gilbert Ryle, Alfred Tarski, Ludwig Wittgenstein, Leo Strauss, Ernst Cassirer, José Juan González, John Dewey and so on. With this segment, explore some of the famous philosophers of the 20th century.