Cato Institute
Policy Analysis
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Page 6
The first thing, that strikes us, upon the
slightest survey of the national Constitution,
is, that its structure contains a fundamental
separation of the three great departments of gov-
ernment, the legislative, the executive, and the
judicial.  The existence of all these departments
has always been found indispensable to due energy
and stability in a government.  Their separation
has always been found equally indispensable, for
the preservation of public liberty and private
rights.  Whenever they are all vested in one
person or body of men, the government is in fact
a despotism, by whatever name it may be called,
whether a monarchy, or an aristocracy, or a
democracy.6
Because 200 years have passed since the ratification of
the Constitution, modern-day Americans tend to forget that
the Constitution of 1787 represented a bold new experiment
in political science.  In England, the balance of power
would shift back and forth between the king and
Parliament.  The judiciary was not known as a separate
power; it was in both theory and practice a part of the
executive.7   While it is true that the Framers of the U.S.
Constitution incorporated those aspects of the British
Constitution that they deemed worthwhile, the separation-
of-powers principle and an independent judiciary were dis-
tinctively American innovations.8
To guard against the danger of one branch's seizing
the powers and prerogatives of the others, the Framers
devised a sophisticated series of "checks and balances."
Congress has the power to pass and repeal laws, but the
president can check those measures by vetoing bills.
Congress can, in turn, override a veto if it can muster a
two-thirds vote.  The Supreme Court has the power of judi-
cial review, but the president has the power to nominate
judges and justices and Congress can confirm or reject
executive nominations.  The House of Representatives has
the power to impeach executive and judicial officers who
engage in misconduct, but the Senate tries all impeach-
ments and the constitutional threshold for conviction is
high--concurrence of two-thirds of the members present.
By equipping each branch with powers of self-defense, the
Framers believed they could prevent the concentration of
governmental power in any one branch.
The constitutional system of checks and balances also
operates within the criminal justice system.  At a general
level, of course, the legislature passes criminal laws,
the executive enforces the law, and the judiciary inter-