Peter Drucker warned us: The shift to a knowledge society, in which brains would be more important than brawn, would transform the workplace. In a 1959 book, Landmarks of Tomorrow, the eminent management guru first described the rise of "knowledge work." He became convinced that knowledge was a more crucial economic resource than land, labor, or financial assets. A few years before his death in 2005, he stated that increasing the productivity of knowledge workers was "the most important contribution management needs to make in the 21st century."