Rick Perlstein is the author of Before the Storm: Barry Goldwater and the Unmaking of the American Consensus, winner of the 2001 Los Angeles Times Book Award for history, and Nixonland: The Rise of a President and the Fracturing of America (2008).

I had other plans for how to spend my Saturday. I had other plans for my next blog post here at The Nation. Then I learned my friend Aaron Swartz had committed suicide, facing a baseless, bullying federal indictment that might have sent him to jail for decades, and fate demanded this be a day to remember.

I remember him contacting me out of the blue—was it in 2005?—and telling me I needed a website, and did I want him to build one for me? I smelled a hustle, asking him how much it would cost, and he said, no, he wanted to do it for free. I thought, What a loser this guy must be. Someone with nothing better to do.

How long was it before I learned instead that he actually was a ball of pure coruscation, the guy who had just about invented something called an “RSS feed” and a moral philosopher and public-intellectual-without-portfolio and tireless activist and makeshift Internet-era self-help guru and self-employed archivist and what his deeply inadequate New York Times obituary called “an unwavering crusader to make that information free of charge”—and, oh yes, how long was it after I heard from him that I learned that he was, what, 20 years old?...