Coming just two decades after the last great global conflict, the Second World War was the most widespread and deadliest war in history, involving more than 30 countries and resulting in more than 50 million military and civilian deaths (with some estimates as high as 85 million dead).
Myths were melting away, and doubt was turning into demand. By 1975, sales of microwave ovens would, for the first time, exceed that of gas ranges. The following year, a reported 17% of all homes in Japan were doing their cooking by microwaves, compared with 4% of the homes in the United States the same year.
Below is a video of John talking about the invention of the microwave oven: John Osepchuk explains some microwave oven history. Also, we refer to The Creative Ordeal, The Story of Raytheon, by Otto J. Scott, published in 1974. This book commemorates the 50th anniversary of the Raytheon Company.