The political scientist Francis Fukuyama looks back on his 1992 book, "The End of History and the Last Man," and what it has predicted about the state of liberalism today.
The demonstration of a potent cyberweapon has exposed China's vulnerabilities and added to the urgency of A.I. safety talks between Beijing and Washington.
Twenty-five years later, it is important to step back from today's cynicism and remember the heroism and national unity in the hours and days after the attacks.