Paul Levinson explains how McLuhan's ideas that the medium (technological developments, such as t.v. and the internet) changes our environment. In turn, we are changed as we become connected to a global nervous system that transcends the limits of time and space.
All understanding is historical, and no human project escapes the characteristics of history-based humanity: fallible, limited, impure of motive, social, and always situated in a culture, a language, and a time. Not even science with its method and its formulas. Thomas Kuhn