This article explains how some factors characterize family size. Furthermore, it explains why poor people in developing countries usually have large numbers of children. Most people are convinced by family values ​​and environment. However, some people are faced with the challenge of surviving. In general, poor people have so many children due to lack of education and resources to care for their children. Another is the man-made family size revolutions. Rich nations are above average and middle-income nations are average; in contrast, low-income nations are below average (p.198). There are other key factors that determine “why do the poor have larger families?” This essay will answer the following questions: 1.) Describe the factors that influence family size? 2.) Why do poor people in developing countries typically have large numbers of children? The factors that influence the size of the family In reading chapter 8, revolutions have given Homo sapiens an authoritative role in the human perspective which is defined as revolutionary. Revolutions have played an important role in bringing humans out of confined cultures into the universal human cultures of today (p.194). There are five factors that influence family size. Wright and Boorse (2011) suggest they are: 1.) Neolithic Revolution: Changed the way humans lived. The shift from hunting and gathering to agriculture led to permanent settlements, the creation of social classes, and the future rise of civilizations (p.194). 2.) Industrial Revolution: Changed the way the world produced its goods. During the 17th and 18th centuries the human population numbered one billion. This was not a political, social or cultural revolution but an economic one (p.194-5). 3.) Medical Revolution – improved medical conditions for humans. In the late 1800s Louis Pasteur and others indicated that diseases originated from bacteria, viruses, and parasites (p.196). 4.) The Green Revolution: the effective use of pesticides and the improvement of fertilization, irrigation, mechanization and soil conservation techniques. This happened during World War II (p.196). 5.) The most recent revolution: Internet, computers, nanotechnology, robotics and solar technologies (p.197). Therefore, revolutions enhanced family growth through the development of tools, medicines, and technologies. In today's society hand tools are mostly powered by batteries or electricity. Furthermore, there are preventive measures that prevent you from contracting diseases. Additionally, computers and other technologies update everyone on what is happening in the world today. Why the poor have a large number of children According to Wright and Boorse (2011) the poor have a large number of children as a result of income and sociocultural conditions (p.