In common law countries judicial opinions are a primary source of law and prior judicial decisions are binding precedents in subsequent cases. In civil law countries, on the other hand, the primary source of law is legislation and courts are bound not by precedents but by provisions of comprehensive codes of criminal law, civil law, and procedure . . . . In common law countries the starting point for judicial reasoning is said to lie in past decisions.
Id. (emphasis provided).
[T]his court has decided that the doctrine of Weems v. Bryan is a law of property, and has twice distinctly announced that it would not overrule that case, but suffer it to stand as an exposition of the law, according to which the people might act, and shape their transactions without apprehension. Men must be presumed to have acted in reference to it, and in reference to the assurance of its stability; property has been received, and delivered, and transferred . . . by many persons.
Id. at 9091.
It is often said among judges that the volume of appeals is so high that it is simply unrealistic to ascribe precedential value to every decision. We do not have time to do a decent enough job, the argument runs, when put in plain language, to justify treating every opinion as a precedent. If this is true, the judicial system is indeed in serious trouble, but the remedy is not to create an underground body of law good for one place and time only. The remedy, instead, is to create enough judgeships to handle the volume, or, if that is not practical, for each judge to take enough time to do a competent job with each case. If this means that backlogs will grow, the price must still be paid. At bottom, rules like our Rule 28A(i) assert that courts have the following power: to choose for themselves, from among all the cases they decide, those that they will follow in the future, and those that they need not.
Anastasoff, 223 F.3d at 904.
[T]he process which I have described has involved the attempt to follow precedents, as well as to give a good reason for them. When we find that in large and important branches of the law the various grounds of policy on which the various rules have been justified are later inventions to account for what are in fact survivals from more primitive times, we have a right to reconsider the popular reasons, and, taking a broader view of the field, to decide anew whether those reasons are satisfactory.
Oliver Wendell Holmes, The Common Law (Mark DeWolfe Howe ed., Harv. Univ. Press 1963) (1881).