Book excerpt: 'Defining Hinduism' focuses on what Hinduism is, what it has been, and what some have argued it should be. The oldest of the world religions, Hinduism presents a complex pantheon and system of beliefs. Far from being unchanging, Hinduism has, like any faith of duration, evolved in response to changing cultural, political and ideological demands. The book brings together some of the leading scholars working on South Asian religions today.