The document discusses harnessing the power of human capital through social media. It states that to harness something means to bring it under conditions for effective use and gain control over it for a particular purpose, similar to how a horse, bell, and sun each require mechanisms, actions, and proper conditions to be useful. The document then defines human capital, social media, and introduces the concept of a "human capital harnessing cycle" to discover, develop, and deploy human capital through social media.