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.

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Andrew C. McCarthy is a senior fellow at National Review Institute, an NR contributing editor, and author of Ball of Collusion: The Plot to Rig an Election and Destroy a Presidency. One of the ...

Drummer and composer Kendrick Scott kicked off his Blue Note contract four years ago with We Are the Drum. Expertly produced by Derrick Hodge, Scott’s creative confidant and musical brother, and ...

How did viruses evolve? Are they a streamlined form of something that existed long ago, or an ultimate culmination of smaller genetic elements joined together? Aa Aa Aa The evolutionary history of ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...