Which phenomenal set the stage for the rapid growth of population in the world?

Industrial Revolution led the world population exploded. Technological advancement achieved so far helped in the reduction of birth rate and provided a stage for accelerated population growth. Industrial belts provide job opportunities and attract large numbers of people. These include not just factory workers but also transport operators, shopkeepers, bank employees, doctors, teachers and other service providers. The Kobe-Osaka region of Japan is thickly populated because of the presence of a number of industries.