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."