Breaking news: someone read Fareed Zakaria. That person was Cam Edwards of NRA News who discovered that Zakaria's work sounded very similar to a piece he had read in the New Yorker.

In particular, Edwards flagged these paragraphs. From Zakaria: 

Adam Winkler, a professor of constitutional law at UCLA, documents the actual history in Gunfight: The Battle over the Right to Bear Arms in America. Guns were regulated in the U.S. from the earliest years of the Republic. Laws that banned the carrying of concealed weapons were passed in Kentucky and Louisiana in 1813. Other states soon followed: Indiana in 1820, Tennessee and Virginia in 1838, Alabama in 1839 and Ohio in 1859. Similar laws were passed in Texas, Florida and Oklahoma. As the governor of Texas (Texas!) explained in 1893, the "mission of the concealed deadly weapon is murder. To check it is the duty of every self-respecting, law-abiding man."

And from the New Yorker: 

As Adam Winkler, a constitutional-law scholar at U.C.L.A., demonstrates in a remarkably nuanced new book, “Gunfight: The Battle Over the Right to Bear Arms in America,” firearms have been regulated in the United States from the start. Laws banning the carrying of concealed weapons were passed in Kentucky and Louisiana in 1813, and other states soon followed: Indiana (1820), Tennessee and Virginia (1838), Alabama (1839), and Ohio (1859). Similar laws were passed in Texas, Florida, and Oklahoma. As the governor of Texas explained in 1893, the “mission of the concealed deadly weapon is murder. To check it is the duty of every self-respecting, law-abiding man."

Zakaria has now apologized, according to Politico: 

"Media reporters have pointed out that paragraphs in my Time column this week bear close similarities to paragraphs in Jill Lepore's essay in the April 22nd issue of The New Yorker. They are right," Zakaria said in a statement to The Atlantic Wire. "I made a terrible mistake. It is a serious lapse and one that is entirely my fault. I apologize unreservedly to her, to my editors at Time, and to my readers."

UPDATE: Politico now adds that Zakaria has been suspended for a month.