"The Better Angels of Our Nature" is a book by Steven Pinker that explores the decline of violence throughout human history. Pinker argues that, despite perceptions of increasing violence, data shows a significant reduction in wars, homicides, and other forms of violence over time. He attributes this decline to various factors, including the rise of civilization, democracy, and human rights. The book examines the psychological and social forces that promote peaceful behavior, suggesting that empathy, reason, and self-control are essential in fostering a more humane society. Pinker emphasizes the importance of understanding these "better angels" to continue the trend toward a less violent world.