Martin Buber was a prominent Austrian-Israeli philosopher and theologian known for his contributions to existentialism and Jewish philosophy. Some synonyms for Martin Buber include a leading figure in religious studies, a foremost authority on Jewish thought, an influential thinker of the 20th century, and a pioneer in the field of dialogical philosophy. Buber's most famous work, "I and Thou," introduced the concepts of I-Thou and I-It relationships, highlighting the importance of mutual recognition and empathy in all human interactions. His ideas have influenced fields such as psychology, education, politics, and communication, making him a key figure in modern philosophical discourse.