Michael Behe

Michael Behe is a biochemist and intelligent design advocate known for his argument that certain complex biological systems, like the immune system or cellular machinery, are "irreducibly complex"—meaning they could not have evolved gradually because all parts must work together from the start. He suggests these systems point to an intelligent designer rather than purely natural processes. Behe's ideas are controversial and are opposed by many scientists who support conventional evolutionary theory, which explains such systems as the result of natural selection acting on small, gradual changes over time.