Big Idea 1 The Process of evolution drives the diversity and unity of life.
Evolution
The process by which different kinds of living organisms are thought to have developed and diversified from warlier forms during the history of the earth.
What drives evolution? According to Charles Darwin, natural selection is the driving mechanism of evolution. Speciation and extinction have occured all through out Earth's history, which helps prove that life continues to evolve within a changing environment, thus proving the diversity of life.