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.

If you’re with-child, you may expect to be greeted by swollen ankles at the end of a long day. But otherwise, the cause of swollen ankles can feel more like a mystery to be solved. Ankles and their ...

April 24, 2026 • At one point in history, one U.S. company monopolized the rare earths industry. Then China took over the industry. Can the U.S. bring it back?

Daniel Liberto is a journalist with over 10 years of experience working with publications such as the Financial Times, The Independent, and Investors Chronicle. David Kindness is a Certified Public ...

Somer G. Anderson is CPA, doctor of accounting, and an accounting and finance professor who has been working in the accounting and finance industries for more than 20 years. Her expertise covers a ...