Proposed in the 1970's, the anthropic principle attempts to explain how the physics of the universe may be perfectly tuned for life to evolve. Any small tweak in gravity or quantum mechanics would make all matter, planets, stars, and life-forms impossible, yet it all is in perfect working order. Why? The anthropic principle poses a simple yet plausible explanation, and is at the heart of a growing debate in the world of physics, philosophy, and religion. Please note this title contains potentially offensive language.