Since 1789, constitutions worldwide have come and gone. According to University of Chicago Law professor Tom Ginsburg the median lifespan of a national constitution is eight yearsroughly the life expectancy of a Great Dane. Why has the U.S. Constitution endured?
Not because it remains unchanged. The Constitution has been reshaped by formal amendments, Supreme Court decisions and changing popular understandings of such broad terms as commerce and equal protection. Although the text largely endures, fidelity to the Constitution requires reading its words in light of the principles they express: principles embracing liberty, equality, and opportunity, as well as a government powerful enough to address pressing national issues and constrained enough to prevent tyranny. Moreover, fidelity requires bringing those principles to bear on fresh problemsinterpreting the Constitution, as Justice Oliver Wendell Holmes said, in light of what this country has become.
The framers could not have imagined the Environmental Protection Agency or the Americans with Disabilities Act. And they punished private, consensual sexual activity. But none of this settles what the Constitution now permits or prohibits. Working that out requires that we ask how the Constitutions text and animating principles should be understood today. While explaining earlier this year why the Eighth Amendments prohibition on cruel and unusual punishments forbids imposing life sentences with no possibility of parole on juveniles, Justice John Paul Stevens powerfully observed:
Society changes. Knowledge accumulates. We learn, sometimes, from our mistakes. Punishments that did not seem cruel and unusual at one time may, in the light of reason and experience, be found cruel and unusual at a later time.
To take a static approach to the law, he warned, risks leading us to abandon the moral commitment embodied in the Eighth Amendment.
This common-sense idea that constitutional interpretation demands an interplay between animating principles and changing circumstances lies at the heart of the Courts most celebrated opinion: Brown v. Board of Education (1954). In Brown a unanimous Court decided that the Fourteenth Amendments equal-protection clause condemns racially segregated schools. But the Congress that had proposed the Fourteenth Amendment had segregated both the public galleries from which citizens watched the debate and the public schools it controlled. When the Court decided Brown, it refused to turn the clock back to 1868 when the Amendment was adopted, or even to 1896 when, in Plessy v. Ferguson, the Court upheld segregation against constitutional attack. The Court of 1954 decisively rejected the idea that the country should be ruled by the understanding of the Fourteenth Amendment held by those who adopted it. Instead, the Court declared, the country must consider public education in the light of its full development and its present place in American life throughout the Nation. Nearly a centurys experience with de jure segregation had proved that, when it came to race, separate but equal violated equal protection of the laws.
Similarly, the framers may have thought that the power of Congress to regulate Commerce involved only trade in goods, and not their manufacture. But in the face of an integrated national economy, this understanding gave way to a more expansive idea of commerce that empowered the federal government to regulate minimum wages and occupational safety. Most profoundly, the Bill of Rights did not originally protect Americans against state or local governments. Nearly a century passed after the ratification of the Fourteenth Amendment before most of the protections we now consider fundamentalincluding freedom of speech and religionwere applied fully to the states.
Originalists drop their originalism when their own principles push in a different direction.
Unfortunately, in recent years,the debate about constitutional interpretation has been dominated by a slippery and misleading originalism that claims to reject the concept of the Constitution as a changing document. Despite its connotations, originalism originated recently, in Reagan-era attacks on the Warren Court. Then-Attorney General Edwin Meese proposed a Jurisprudence of Original Intention: what would the framers do if they were asked the question we face?
Asking what James Madison would do sounds like a good way to prevent judges from overriding democratically enacted laws. But even conservatives soon abandoned this original originalismperhaps because it was impossible to figure out what our forebears would have done when faced with questions they could not even formulate; perhaps because the answers were unpalatable. It would, for example, require a vivid imagination to argue that the authors of the Fourteenth Amendment would have cared at all about sex discrimination, especially because they enshrined it in the Amendment itself (in the reduction-of-representation clause of section 2).
Rejecting original intent, originalists shifted to original public meaning. Justice Antonin Scalia, for example, says that we are bound by the Constitutions words, as they were understood by ordinary citizens in the founding generation. This shift, however, does nothing to change the unpalatable answers: ordinary citizens in 1868 did not think that equal protection of the laws condemned segregated schools.
Moreover, originalists drop their originalism when their own principles push in a different direction. In Kyllo v. United States (2001), for example, Justice Scalia interpreted the word searchin the Fourth Amendments ban on unreasonable search and seizure to encompass police use, while standing on public property, of a thermal-imaging device to determine that a homeowner was consuming huge amounts of energy in order to grow marijuana in the basement. In 1789 a search would have required some physical intrusion onto private property. Still, the justice relied on a general principle of privacy to conclude that the Constitution should protect what goes on inside a house.
Similarly, in District of Columbia v. Heller (2008), which extended the Second Amendments right to keep and bear arms to hand guns in Washington, D.C., Justice Scalia rejected the idea that only those arms in existence in the eighteenth century are protected by the Second Amendment. The Amendment extends to all instruments that constitute bearable arms, even those that were not in existence at the time of the founding. Having reached that seemingly sweeping conclusion, Justice Scalia then scaled it back to protect only handguns, not AK-47s, because hand guns are overwhelmingly chosen by American society as a means of self-defense. But handguns were not the founding generations weapon of choice. Why, then, is the term arms permitted to evolve over time, while cruel and unusual punishment is not?
Originalism offers the false hope of a principled constraint on judicial power. If judges stuck with their originalist guns, the Constitution would never have lasted. And when judges who profess originalism abandon it in service of constitutional principles, rather than hurling back at them the meaningless accusation of judicial activismthe topic of my next columnwe should press the real argument: the most important constitutional principles require liberty, equality, and opportunity for all.
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Pamela S. Karlan is Kenneth and Harle Montgomery Professor of Public Interest Law at Stanford Law School.
Pamela S. Karlan and others, Six Ways To Reform Democracy

I wonder, though, about continued use of the phrase "living
constitution". Progressive legal thinkers are probably inviting scorn by failing to abandon this metaphor in describing our constitutional theory. In a sense, the fact that our constitutional theory is a metaphor is part of the problem. Whatever other criticisms originalism is open to--and there are many--it has two clear benefits: it appears to be a system of analysis, and it accords with common understandings of how law works. The general public does not really believe laws "change" by some organic, self-confined process. When we progressives assert that the Constitution does just that, we alienate people. What's worse, the almost spiritual notion of an "evolving" constitution validates one of the general public's worst prejudices about progressives, that we are unrigorous, somewhat mystical, and usually high on drugs.
We're moving into an era where progressives have a shot at dominating the national conversation. Changing demographics, the rise of alternative media, and the ongoing mental breakdown in the Right--coupled with the native political talent of our current President--provide an opening we cannot afford to miss. Clearing progressive thought of Nineteen-eighties clutter, like the "living constitution theory", is as necessary to the upcoming progressive advent as burning a pasture every spring.
I propose a progressive theory of constitutional interpretation that focuses on danger and evil. That is, every contestable clause in the Constitution was written to address a particular danger or evil. The starting point for controversies where one of these clauses is invoked, then, must be: is the presently challenged act or omission dangerous or evil in the same way as the acts or omissions that caused the clause to be written?
2. M'Colloch v. Maryland (1820), where John Marshall wrote for the Supreme Court that exigencies will arise that will require Congress and the President to act differently than the Framers might have thought. It's where "necessary and proper" start to sound plenary, and not limited. And the decision upheld a federal government bank that decided who got tax payer money and who did not, for goodness sakes! And we're supposed to think there is something to Randy Barnett's argument that the tax on people who refuse to buy a health insurance policy is unconstitutional?
When one compares the jurisprudence of John Marshall, the Gilded Age jurists and the later New Deal era jurists, one sees the odd men out are the Gilded Age jurists, who tried to limit constitutional power for everyone except corporations and the richest economic elite, and of course exalted white folks above everyone else.
The only problem with that is that it has absolutely nothing to do with the topic at hand: why has the Constitution endured? The author seems to forget that this is the question she purportedly wants to answer, and waxes lyrical about why originalism is bad. There is no coherent argument as to how this relates to the Constitution\'s longevity. Hence, the title is completely inappropriate and the article somewhat pointless.
Reading comprehension.