Excerpt reproduced from [http://www.lexisnexis.com/store/catalog/productdetail.jsp?pageName=relatedProducts&skuId=SKU45180&catId=88&prodId=45180 American Legal Systems: A Resource and Reference Guide] (Anderson Publishing, a member of the LexisNexis Group 1997) by Toni M. Fine

== Basic Concepts of American Jurisprudence ==

"What follows are some of the fundamental principles that comprise the
American legal system. Each of these is discussed in greater detail in this
and other chapters of this book. They are summarized below in order to
give the reader an overview of some of the basics of American common law."

'''1. Impact of Precedent—The Principle of Stare Decisis'''

"The defining principle of common law is the requirement that courts
follow decisions of higher level courts within the same jurisdiction. It is
from this legacy of stare decisis that a somewhat predictable, consistent
body of law has emerged."

'''2. Court Hierarchy'''

"Court level or hierarchy defines to a great degree the extent to which
a decision by one court will have a binding effect on another court. The
federal court system, for instance, is based on a three-tiered structure, in
which the United States District Courts are the trial-level courts; the
United States Court of Appeals is the first level court of appeal; and the
United States Supreme Court is the final arbiter of the law."

'''3. Jurisdiction'''

"The term “jurisdiction” has two important meanings in American law.
One meaning of “jurisdiction” refers to the formal power of a court to
exercise judicial authority over a particular matter. Although the term
most often is used in connection with the jurisdiction of a court over particular
matters, one may also speak of matters being within or beyond the
jurisdiction of any other governmental entity."

"Second, the federal court system is based on a system of “jurisdictions,”
the geographic distribution of courts of particular levels. For
instance, while there is only one Supreme Court, the court of appeals is
divided into 13 circuits, and there are 94 district courts. See Chapter
I.H.3. In addition, each state court system comprises its own “jurisdiction.”
As indicated above, the jurisdiction in which a case arose will determine
which courts’ decisions will be binding precedents."

'''4. Mandatory/Binding versus Persuasive Authority'''

Some of the various sources of law that will be examined are considered
to be “mandatory” or “binding,” while other sources are considered to
be merely “persuasive.” See Chapter I.G. Indeed, a court may completely
disregard precedent that is not binding (i.e., not even consider it to be persuasive).
The issue of whether authority is mandatory or persuasive relates
directly to the application of stare decisis principles."

'''5. Primary versus Secondary Authority'''

"The various sources of law may also be broken down into primary
and secondary sources of law. Primary sources of law may be mandatory
on a particular court, or they may be merely persuasive. Whether they are
binding or persuasive will depend on various factors.
Secondary authority is not itself law, and is never mandatory authority.
A court may, however, look towards secondary sources of law for guidance
as to how to resolve a particular issue. See Chapters I.G., II.B. Secondary
authority is also useful as a case finding tool and for general information
about a particular issue."

'''6. Dual Court Systems'''

"The American legal system is based on a system of federalism, or
decentralization. While the national or “federal” government itself possesses
significant powers, the individual states retain powers not specifically
enumerated as exclusively federal. Most states have court systems
which mirror that of the federal court system."

'''7. Interrelationship Among Various Sources of Law'''

"One of the more complex notions of American jurisprudence is the
extent to which the various sources of law, from both the state and federal
systems, interrelate with one another. There is a complex set of rules that
defines the relative priority among various sources of law and between the
state and federal systems."

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