Phenomenology and existentialism emerged in the early 20th century, challenging traditional philosophical approaches. These movements focus on human experience, consciousness, and the search for meaning in life. They emphasize individual existence, freedom, and responsibility. Key thinkers like Husserl, Heidegger, and Sartre developed concepts such as intentionality, being-in-the-world, and radical freedom. These ideas influenced various fields, including psychology, literature, and social theory, shaping modern understanding of human existence and consciousness.