"Themes in World History" introduces developments in technology and human thought that have changed the course of history. It begins by going over ancient civilizations in Mesopotamia, Egypt, and the Indus Valley. It discusses each of their contributions to history from medical practices and the calendar to cotton and iron working. This episode discusses irrigation as one of the major keys in the birth of civilization. Important periods of history such as the Classical period, the Renaissance period, the Industrial Revolution, and the 20th century are reviewed. To prepare for the world history portion of GED test it's helpful to visit museums, rent historical movies, and read the newspaper and magazines.