Posthumanism is an academic concept and interdisciplinary research field that critically interrogates the foundational assumptions of traditional humanism, particularly its anthropocentric view of the human as a distinct, autonomous, and superior being. This field investigates the implications of technological advancements, ecological crises, and scientific understandings for the definition of humanity, exploring the blurring boundaries between humans, animals, machines, and the environment, and challenging conventional notions of subjectivity, agency, and identity. Its significance lies in offering alternative frameworks for understanding existence and interaction in a complex, interconnected world.