Before revision:  The three stages of growth did not exist and the Industrial Revolution had no effect on the world economic growthand on the growth of human population. Whatever the Unified Growth Theory is describing it is not describing the economic growth and the growth of human population .
After revision:  The three stages of growth did not exist and the Industrial Revolution had no effect on the economic growth. The data clearly indicate that the economic growth was not as complicated and untidy as incorrectly described by the Unified Growth Theory but elegantly simple .