In his 1959 book, “Landmarks of Tomorrow,” he coined the term “knowledge work,” and argued that autonomy would be the central feature of the new corporate world. Drucker predicted that corporate profits would depend on mental effort, and that each individual knowledge worker, possessing skills too specialized to be broken down into “repetitive, simple, mechanical motions” choreographed from above, would need to decide how to “apply his knowledge as a professional” and monitor his own productivity. “The knowledge worker cannot be supervised closely or in detail,” Drucker wrote, in “The Effective Executive,” from 1967. “He must direct himself.”