Why this newfound interest? They have started to realize that whether software designer or delivery truck driver, accountant or hotel housekeeper, the most valuable aspects of jobs are now, as Thomas Stewart describes in Intellectual Capital, “the most essentially human tasks: sensing, judging, creating, and building relationships.” This means that a great deal of a company’s value now lies “between the ears of its employees.” And this means that when someone leaves a company, he takes his value with him — more often than not, straight to the competition.