I agree on all 4 counts. I made a thread about this a while ago, so I'll just throw some facts in to show the folly of prohibition.
Crime:
The US arrests 1.5 million of people each year and puts 500,000 of them behind bars.
1 in 5 black Americans have been to jain on drug related charges.
Since 2006 in Mexico 800 policemen and soldiers have been killed. The annual overall death toll being over 6000.
Wasted revenue:
$40 billion per year enforcing drugs prohibition. Is it right so much capital should be invested in an effort that's doomed to fail?
Personal Freedom:
5% of the world's adult population take drugs. Surely they should be able to do so without fear of death or imprisonment?
The myth surrounding the addictiveness of drugs, even hard drugs is not sound:
Tobacco is the most addicting drug in the world, yet smoking remains legal.
There are 3.7 million cocaine users in the US. 1/3rd (1.2 million) of whom use once a month, 1/6th (600,000) of them using more than once a week.
With regards to heroin there are 1.2 million users in the US. Again 1/6th (208,000) of whom are addicts.
Product control:
The drugs market can adapt to disruption quickly and effectively, shifting production sites to nations like Afghanistan where they are undermining the efforts of ISAF forces operating in the area. Legalisation would solve this problem.
Prohibition increases the price of drugs by 5000% giving the illicit suppliers an inflated income. Legalisation would deal with this problem.
Drugs industry worth $320 billion per year. Surely this money would be put to better use if ti was in the right hands?
It increases the health risks associated with needle use, which could be solved more effectively if it were legalised.
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To sum up, the prohibition of drugs has evidently failed to deal with the issue correctly, thus legalisation is the least bad option.