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.

Cancer and ageing appear to represent the failure or success, respectively, of vital tumour-suppressor mechanisms that rely on the activities of telomere shortening and the activation of the ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Michael Boyle is an experienced financial professional with more than 10 years working with ...

Since the United Nations General Assembly designated 2 April as World Autism Awareness Day (WAAD) in 2007, the UN has worked to promote the full realization of human rights and fundamental freedoms ...