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.

Joe Liebkind is a reporter for top finance sites with 5+ years of experience as a writer, content strategist, and tech consultant. Erika Rasure is globally-recognized as a leading consumer economics ...