There appears to be a shift in the United States in favor of relaxing marijuana laws, a topic that has dipped in and out of the national conversation for decades. Public perceptions about pot have come a long way, from the dire warnings of "Reefer Madness" to growing acceptance of medical marijuana. 
Members of a crowd numbering tens of thousands smoke and listen to live music at the Denver 420 Rally on April 20, 2013. Annual festivals celebrating marijuana are held around the world on April 20, a counterculture holiday. 
A man smokes a joint during the official opening night of Club 64, a marijuana social club in Denver, on New Year's Eve 2012. Voters in Colorado and Washington state passed referendums to legalize recreational marijuana on November 6, 2012. 
People light up near the Space Needle in Seattle after the law legalizing the recreational use of marijuana went into effect in Washington on December 6, 2012. 
Nutrient products are placed on shelves in the weGrow marijuana cultivation supply store during its grand opening on March 30, 2012, in Washington, D.C. The store is a one-stop-shop for supplies and training to grow plants indoors, except for the actual marijuana plants or seeds. Legislation was enacted in 2010 authorizing the establishment of regulated medical marijuana dispensaries in the nation's capital. 
Marijuana activist Steve DeAngelo wears a "Yes on Prop 19" button as he speaks during a news conference in Oakland, California, on October 12, 2010, to bring attention to the state measure to legalize marijuana for recreational purposes in California. Voters rejected the proposal. 
Sonja Gibbins walks through her growing warehouse in Fort Collins, Colorado, on April 19, 2010. Since the state approved medical marijuana in 2000, Colorado has seen a boom in marijuana dispensaries, trade shows and related businesses. So far 20 states and the District of Columbia have made smoking marijuana for medical purposes legal. 
A patient prepares to smoke at home in Portland, Maine, on October 22, 2009, a decade after the state approved a medical marijuana referendum. 
Coffeeshop Blue Sky worker Jon Sarro, left, shows a customer different strains of medical marijuana on July 22, 2009, in Oakland, California. Voters in the city approved a measure during a vote-by-mail special election for a new tax on sales of medicinal marijuana at cannabis dispensaries. 
Medicinal marijuana patient Angel Raich wipes her eyes during a press conference on March 14, 2007, in Oakland, California. The 9th circuit U.S. Court of Appeals in San Francisco ruled that 41-year-old Raich, who used medicinal marijuana to curb pain from a brain tumor as well as other ailments, did not have the legal right to claim medical necessity to avoid the possibility of prosecution under federal drug laws. 
Different varieties of medical marijuana are seen at the Alternative Herbal Health Services cannabis dispensary in San Francisco on April 24, 2006. The Food and Drug Administration issued a controversial statement a week earlier rejecting the use of medical marijuana, declaring that there is no scientific evidence supporting use of the drug for medical treatment. 
People in New York gather for a pro-cannabis rally on May 4, 2002. That same day, almost 200 similar events took place around the world to advocate for marijuana legalization. It was dubbed the "Million Marijuana March." 
Dennis Peron takes notes during a phone interview while Gary Johnson lights up at the Proposition 215 headquarters in San Francisco on October 11, 1996. The ballot measure was approved when voters went to the polls in November, allowing medical marijuana in California. 
A television ad aired in 1996 by Republican presidential candidate Bob Dole's campaign included footage from a 1992 MTV interview of a laughing President Clinton saying he would inhale marijuana if given the chance to relive his college days. 
President George H. Bush holds up a copy of the National Drug Control Strategy during a meeting in the Oval Office on September 5, 1989. In a televised address to the nation, Bush asked Americans to join the war on drugs. 
Robert Randall smokes marijuana that was prescribed to treat his glaucoma in 1988. He became the first legal medical marijuana patient in modern America after winning a landmark case in 1976. 
First lady Nancy Reagan participates in a drug education class at Island Park Elementary School on Mercer Island, Washington, on February 14, 1984. She later recalled, "A little girl raised her hand and said, 'Mrs. Reagan, what do you do if somebody offers you drugs?' And I said, 'Well, you just say no.' And there it was born." She became known for her involvement in the "Just Say No" campaign. 
President Jimmy Carter, with his special assistant for health issues, Dr. Peter Bourne, beside him, talks to reporters at the White House about his drug abuse control message to Congress on August 2, 1977. Among other things, he called for the elimination of all federal criminal penalties for the possession of up to one ounce of marijuana. 
Panel members of the National Commission on Marijuana and Drug Abuse attend a hearing In Denver on January 10, 1972. From left, Dr. J. Thomas Ungerleider, psychiatrist; Michael R. Sonnenreich, commission executive director; Raymond P. Shafer, commission chairman; Mitchell Ware, Chicago attorney; Charles O. Galvin, Dallas law school dean. The commission's findings favored ending marijuana prohibition and adopting other methods to discourage use, but the Nixon administration refused to implement its recommendations. 
Protesters wade in the Reflecting Pool at the National Mall in Washington during the "Honor America Day Smoke-In" thrown by marijuana activists in response to the official "Honor America Day" rally organized by President Nixon supporters at the Lincoln Memorial on July 4, 1970. 
Marijuana reform was the Life magazine cover story in October 1969. The banner read: "At least 12 million Americans have now tried it. Are penalties too severe? Should it be legalized?" 
Police dogs trained to smell out hidden marijuana examine U.S. soldiers' luggage at the airport during the Vietnam War in 1969. Drug use was widespread during the war. 
People share a joint during a 1969 concert in Portland, Oregon. In 1973, Oregon became the first state to decriminalize cannabis. 
Marijuana use became more widespread in the 1960s, reflecting the rising counterculture movement. 
Research scientist Dr. Reese T. Jones, right, adjusts the electrodes monitoring a volunteer's brain response to sound during an experiment in 1969 that used a controlled dosage of marijuana. The tests were conducted at the Langley Porter Institute at the University of California, San Francisco. 
U.S. Customs agents track the nationwide marijuana market during Operation Intercept, an anti-drug measure announced by President Nixon in 1969. The initiative intended to keep Mexican marijuana from entering the United States. 
Members of the Grateful Dead talk with reporters from their home in San Francisco on October 5, 1967. The band was protesting being arrested for marijuana possession. 
A woman buys ready-rolled marijuana cigarettes from a dealer at her door circa 1955. 
Even after Congress cracked down on marijuana in 1937, farmers were encouraged to grow the crop for rope, sails and parachutes during World War II. The "Hemp for Victory" film was released in 1942 by the U.S. Department of Agriculture. 
Marijuana cigarettes are hidden in a book circa 1940. Congress passed the Marijuana Tax Act in 1937, effectively criminalizing the drug. 
A poster advertises the 1936 scare film "Reefer Madness," which described marijuana as a "violent narcotic" that first renders "sudden, violent, uncontrollable laughter" on its users before "dangerous hallucinations" and then "acts of shocking violence ... ending often in incurable insanity." 
Harry Anslinger was named commissioner of the Federal Bureau of Narcotics when it was established in 1930. While arguing for marijuana prohibition, he played on Americans' fear of crime and foreigners. He spun tales of people driven to insanity or murder after ingesting the drug and spoke of the 2 to 3 tons of grass being produced in Mexico. "This, the Mexicans make into cigarettes, which they sell at two for 25 cents, mostly to white high school students," Anslinger told Congress. 
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- A report says cheaper, purer illegal substances suggest war on drugs is failing
- Kevin Sabet: Actually, global drug use has been stable over the past decade
- He says some think legalization is the solution, but that would lead to more drug use
- Sabet: Legalization means companies will try to increase addiction to make more money
Editor's note: Kevin A. Sabet is the author of "Reefer Sanity: Seven Great Myths About Marijuana," director of Project SAM (Smart Approaches to Marijuana) and a former White House drug policy adviser.
(CNN) -- "The war on drugs has failed" is a mantra often heard in policy and media circles these days. But not only is the phrase outdated (the 1980s called -- they want their slogan back), it is far too simplistic to describe both current drug policy and its outcomes.
The latest incarnation of this ill-advised saying can be found in a report arguing that since cannabis and heroin prices have fallen while their purity has increased, efforts to curb drug use and its supply are doomed to failure. This leads some to highlight the possibility of alternatives in the form of "regulation" (e.g., legalization) of drugs.
But a closer look at the data -- and the implications for a policy change to legalization -- should give us pause if we care about the dire consequences drug addiction has on society.
Globally, drug use has been stable over the past decade, though it is difficult to paint such a broad brush across countries and substances. But in the U.S. alone, there has been a 40% drop in cocaine use since 2006 and a 68% decrease in workplace positive cocaine tests. Overall in the U.S., all drug use has fallen by about 30% since 1979.
There are likely numerous reasons for this drop, but we can't ignore the fact that the world's top supplier of the drug -- Colombia -- has greatly improved its security situation over the same period.
With help from the United States, Colombia has managed to reduce the amount of land dedicated to coca growing by nearly two-thirds from 2000 to 2010.
Potential production of cocaine has also fallen more than 60%, though in places without such security enhancements -- namely Bolivia and Peru -- cocaine production has picked up. Still, this shows that progress is not only possible, it is happening.
As for the opiates and cannabis, trends vary widely in different regions around the world. While critics are right to say that prices have fallen while potency has risen generally, globally the picture is much more mixed (the global cultivation of poppy has actually fallen since 1997 worldwide).
In policy analysis, the key question that must follow any sentence that says "X policy is good/bad" is: "Compared to what?"
Free pot handed out in Colorado 
Washington details pot sale rules Some have offered legalization as a possible alternative. But we know from our experience with currently legal drugs -- prescription drugs (which are now the leading cause of accidental deaths in the U.S.), alcohol and tobacco -- that legality means commercialization, normalization and wider access and availability that lead to more use and addiction.
Legalization in the United States is likely to accompany a bombardment of promotion, similar to our other three classes of legal drugs. These industries will stop at nothing to increase addiction since their bottom line relies on it. In fact, we know that 80% of the profit from addictive industries comes from the 20% of users who consume most of the volume of the substance.
According to internal documents that the government forced Big Tobacco to release during its historic court settlement, those companies are ready to pounce on the golden opportunity of drug legalization.
It is no wonder that the parent company of Phillip Morris, Altria, recently bought the domain names "AltriaCannabis.com" and "AltriaMarijuana.com." If this sounds frightening, it should be.
Big Tobacco tried for decades to conceal the harms of their drug, and millions of lives were lost as a result. We are naive to think that this wouldn't happen with any other drug that is legalized.
Where does that leave us? That legalization is not a solution does not mean we have to be content with the status quo. Proven interventions such as community-based drug prevention efforts, drug treatment courts, offender re-entry programs and probation reform should be more robustly implemented and taken to scale. It is shameful that the richest country in the world can't figure out a way to make drug treatment available to all who need it, and we must stop relying on incarceration to deal with the drug problem.
Interestingly, though, according to criminologist Mark Kleiman, if all drug prisoners were released tomorrow, we would still have four times the number of people in prison than our historical incarceration rate instead of five. That tells me that the root causes of drug use, trafficking and crime, must be seriously tackled.
On the other hand, legalization -- especially in ad-obsessed America -- would not only sweep the causes of drug use under the rug, it would open the floodgates to more addiction, suffering and costs than we could ever bargain for.
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The opinions expressed in this commentary are solely those of Kevin Sabet.
