“Every past crash that I can think of was an accident, in that there was something that wasn’t really reasonably foreseeable,” a pilot and software engineer said. “This was entirely different. . . . This was a collision of deregulation and Wall Street.”

President Trump’s impeachment is hurtling toward an acquittal in the Republican-controlled Senate by February, with nine months left before the election.

"In the course of this past year, I’ve found myself wondering, more than a few times, whether we are living through the world’s stupidest era," @frynaomifry  writes.

According to the French philosopher Jacques Derrida, the intimacy of friendship lies in the sensation of recognizing oneself in the eyes of another.

David Runciman, the author of the book “How Democracy Ends,” on the results of the U.K. election.

Hilton Als writes about encountering the powerful literary voice of Joan Didion: “Her ways of thinking and of expressing herself were unlike anyone else’s.”

"The President doesn’t give a shit about what’s good for our country, what’s good for Ukraine. It’s all about what’s in it for him personally and for his reëlection campaign,” Adam Schiff said.

Test your knowledge of the 2010s with our end-of-decade quiz. How many did you get right?

Where do ideas come from? For the mathematician Dan Rockmore, it’s a lot of hard work, and a little bit of magic.

For four decades, the writer William Gibson has imagined the near future more convincingly than anyone else. Now he finds it hard to grapple with Brexit, the Trump Presidency, and climate change.