Robert F. Kennedy was killed 50 years ago on June 6--the third in a trio of high-profile assassinations during that dec­ade, the bloody coda to an era of political violence. Today, in our divided, uncivil time, it's worth remembering that Americans survived the horrors of the 1960s and early '70s, which began with the murder of Robert's older brother, President John F. Kennedy, in 1963. But 1968 was something of a watershed: "The year that shattered America," as Smithsonianhas called it, demolished the hippie fever dream of the '60s with an explosive cocktail of escalating war, racially charged riots, ­police brutality and the assassinations of Martin ­Luther King Jr. and then RFK.

There was no 24-hour news cycle back then. Social media was not spreading hate or forging divisive bubbles. The president wasn't fanning flames with regular tweets, covert Russian hackers weren't propagating fake news, and books proclaiming the end of democracy hadn't become a lucrative sideline for publishers--all of which exacerbates our current turmoil, which can feel intractable.