The internet is a mountain, and if you climb that mountain, waiting for you at the top will be the person with whom you need to make peace. I climbed my mountain and a woman named Justine Sacco was there.

Yesterday, a white person tweeted something horrible. We tend to do that, but this time there was a catch: this white person — Justine Sacco, the global head of communications for the Barry Diller-led firm IAC — was on a 12-hour flight from London to Cape Town, giving the internet an inordinate amount of time to gather its torches.