Jeffrey Bruce Klein, one of four journalists who in 1976 founded the magazine Mother Jones, rooted it in the crusading left-wing politics of the 1960s. He returned in 1992 as editor in chief to rebrand it for younger more digital readers. He died on March 13 at his home in Menlo Park, CA at age 77.

The founders called it Mother Jones in honor of the fiery labor leader Mary Harris Jones. Mr. Klein left Mother Jones in 1998, taught journalism at Stanford and worked as a producer for “PBS NewsHour” with Jim Lehrer. His “NewsHour program on the Chinese economy won a Gerald Loeb Award in 2006.