I dont know that book so if u can then cool
Here it is, prohibition from an economic aspect :
"Many people believe that the laws against the illegal use of drugs are impossible to enforce effectively. Use remains high despite the large number of people who are in jail for producing, transporting, dealing, possessing, or using illegal drugs.
The illegal drug trade is highly lucrative in large part because it is illegal. The legal restrictions placed on the trade have decreased supply relative to demand, which has caused prices to be much higher than they otherwise would be. The legal restrictions also have allowed dealers to form territorial monopolies because competitors can hardly petition the government for relief under antitrust statutes. The high penalties for drug trafficking also make the penalties for murder committed to protect territorial monopolies relatively less significant.
The high prices of illegal drugs are responsible for much of the burglary, robbery, and prostitution in Western societies. Addicts who need their next fix must get it. The more expensive is the fix, the more crime they must commit. Since criminals often use force to commit these crimes, they expose those who do not use drugs to substantial personal risk.
The high prices of illegal drugs also cause users to become dealers in order to support their habits. These dealers have tremendous incentives to hook new clients. Ironically, because of this factor alone, usage is probably higher than it would be if drug usage and distribution were legal and regulated.
The huge wealth accumulated by drug dealers corrupts society. Criminals use their wealth to corrupt the legal system. Their wealth also corrupts the values of people who see how successful they are. The war on drugs is largely responsible for the extreme social instabilities found in many drug producing countries.
Although the restriction of insider trading fortunately has not had the same negative effects as the war on drugs, many people believe that the two problems share many essential aspects."
From "Trading & Exchanges - Market microstructure for practitioners" by Larry Harris.
The book is well woth a read by the way.