 Finally, we might understand the distinction among the three strands as a difference in the view each adopts about the instrumentalism of law. “Instrumentalism” here means that an agent designs the law to promote some collective goal. Kornhauser [2000, 2010] discuss this idea at length. For our purposes, we need only note several ambiguities in the brief definition just given. A more careful definition would specify the agent who designs, the meaning of design, what counts as “law,” and what is a collective purpose. Right now, we note only that instrumentalism may occur at the level of the rule, the institution or the legal system as a whole.