Television is a form of media without equal. It has revolutionized the way we learn about and communicate with the world and has reinvented the way we experience ourselves and others. More than just cheap entertainment, TV is an undeniable component of our culture and contains many clues to who we are, what we value, and where we might be headed in the future.

Media historian Gary R. Edgerton follows the technological developments and increasing cultural relevance of TV from its prehistory (before 1947) to the Network Era (1948-1975) and the Cable Era (1976-1994). He begins with the...