“I’m ashamed of you, dodging that way. They couldn’t hit an elephant at this distance,” said Maj. Gen. John Sedgwick not long before a Confederate bullet struck his skull and killed him.

By the end of the century, a report by the National Science Foundation in 1982 predicted, 40 percent of American homes will have “two videotex service”—a term describing the emergent conjunction of communications and computing. A U.S. Census report found in 2000 that 42 percent of American homes used the Internet. The first year the census started tracking U.S. computer usage was 1984.

“Six days, six weeks. I doubt six months,” said Donald Rumsfeld, on February 7, 2003, about the duration of the Iraq war. “Whatever happens in Vietnam, I can conceive of nothing except military victory,” Dwight D. Eisenhower said in 1967. Four years before that, Robert McNamara asserted, “The war in Vietnam is going well and will succeed.”

According to Dignitas, an end-of-life clinic located in Switzerland, 70 percent of people who begin the formal process of assisted suicide do not go through with it.

“The splendors of this age outshine all other recorded ages,” wrote Ralph Waldo Emerson in 1871. “I have seen wrought five miracles—namely, the steamboat, the railroad, the electric telegraph, the application of the spectroscope to astronomy, the photograph.” He died in 1882, missing the invention of the machine gun by three years, the gramophone and radar by five years, and the diesel-fueled internal combustion engine by ten years.