"Darwin's Dangerous Idea" refers to the concept of natural selection, proposed by Charles Darwin. This idea suggests that species evolve over time through a process where individuals with advantageous traits are more likely to survive and reproduce. This mechanism explains the diversity of life on Earth and challenges traditional views of creation. The term also highlights the implications of Darwin's theory on various fields, including biology, philosophy, and sociology. It raises questions about the nature of existence and humanity's place in the world, suggesting that life is shaped by random variations and environmental pressures rather than a predetermined design.