Twenty years after the introduction of the theory, we revisit what it does—and doesn’t—explain. by Clayton M. Christensen, Michael E. Raynor and Rory McDonald Please enjoy this HBR Classic. Clayton M.

During its WWDC keynote on June 9, 2025, Apple confirmed that the next version of the iPhone operating system would be iOS 26 and revealed some of the upcoming features. Now iOS 26 is out for everyone ...

Julie Young is an experienced financial writer and editor. She specializes in financial analysis in capital planning and investment management. Khadija Khartit is a strategy, investment, and funding ...