Art as radar acts as "an early alarm system," as it were, enabling us to discover social and psychic targets in lots of time to prepare to cope with them. This concept of the arts as prophetic, contrasts with the popular idea of them as mere self-expression. If art is an "early warning system," to use the phrase from World War II, when radar was new, art has the utmost relevance not only to media study but to the development of media controls.