What book did Darwin publish that explained hos ideas and proposed a machanism of evolution?

Charles Darwin published "On the Origin of Species" in 1859, where he presented his theory of evolution by natural selection. This book proposed that species evolve over time through the process of natural selection, where individuals with advantageous traits are more likely to survive and reproduce. It had a profound impact on the scientific community and revolutionized the way we understand the diversity of life on Earth.