For those who grew up after World War II “rocket science” meant something extremely difficult, on the very edge of the possible, pursued by the brightest of the bright, often at risk of death or dire injury. In the first half of the century, however, “rocket” was a pejorative, summoning images of pulp magazines full of “that Buck Rogers stuff”, fireworks that went fwoosh—flash—bang if all went well, and often in the other order when it didn’t, with aspiring rocketeers borderline lunatics who dreamed of crazy things like travelling to the Moon but usually ended blowing things up, including, but not limited to, themselves.

This was the era in which John Whiteside “Jack” Parsons came of age. Parsons was born and spent most of his life in Pasadena, California, a community close enough to Los Angeles to participate in its frontier, “anything goes” culture, but also steeped in well-heeled old wealth, largely made in the East and seeking the perpetually clement climate of southern California. Parsons was attracted to things that went fwoosh and bang from the very start. While still a high school senior, he was hired by the Hercules Powder Company, and continued to support himself as an explosives chemist for the rest of his life. He never graduated from college, no less pursued an advanced degree, but his associates and mentors, including legends such as Theodore von Kármán were deeply impressed by his knowledge and meticulously careful work with dangerous substances and gave him their highest recommendations. On several occasions he was called as an expert witness to testify in high-profile trials involving bombings.