Who is Edward T. Hall from Beyond Culture and what is their importance?

Edward T. Hall is the author of the book "Beyond Culture;" he is also the source of many firsthand experiences used as examples and material in this book, in cultures as varied as those of the American Southwest and the Japanese nation. As a young man, he worked as a construction foreman in Arizona where he lived and worked with the Hopi Indians. Later he conducted anthropological research among the Navajo Indians.