The Democratic presidential candidate and America’s most prominent ‘conspiracy theorist’ talks about his family, the military-pharmaceutical complex, and our new system of social control first met Bobby Kennedy Jr. when he showed up one summer afternoon in 1976 at the door of my ordinary suburban home in the company of a friend from Harvard named Peter Shapiro, who was running for a seat in the New Jersey State Assembly. I was 9 years old, and not particularly thrilled about our family’s recent move from Brooklyn to a street of empty suburban lawns whose nearest point of interest was a candy...