The "Law of the Jungle" refers to a set of survival principles that govern the behavior of animals in the wild. It emphasizes the idea that only the strongest and most adaptable creatures can thrive in their natural habitats. This concept is often associated with the struggle for resources, such as food and territory, where competition is fierce. The phrase is also popularized by Rudyard Kipling in his book, The Jungle Book, where it describes the rules that animals follow to maintain order and balance in their ecosystem. In this context, the law serves as a metaphor for the harsh realities of life and the instinctual behaviors necessary for survival.