The Phenomenology of Spirit (or Mind) is perhaps Hegel's most important philosophical work. It formed the basis of his later philosophy and marked a significant development in German idealism after Kant. Focusing on topics in metaphysics, epistemology, physics, ethics, history, religion, perception, consciousness, and political philosophy, The Phenomenology is where Hegel develops his concepts of dialectic (including the Master-slave dialectic), absolute idealism and ethical life. The book had a profound effect on Western philosophy and has been praised and blamed for the development of existentialism, communism, fascism, death of God theology, and historicist nihilism. In this book, Hegel takes the reader through the evolution of consciousness. In the work, the mind experiences different stages of consciousness. It begins with the lower levels of consciousness and concludes with the higher levels of consciousness.