> We have penicillin and much better cancer therapy and jet airplanes. Humans have stepped on the moon. We have domestic electric refrigerators (since 1927).

> We have penicillin and much better cancer therapy and jet airplanes. Humans have stepped on the moon. We have domestic electric refrigerators (since 1927). Cold beer on a hot afternoon. The development of refrigeration has transformed the world’s economy, and is a good example of how technology can multiply economic growth.