Marijuana legalization

When we talk about legalizing marijuana, there are many economic, health, and social issues to analyze. This text separates the legalization in two. One is the economic and the other is the social part.
When talking about economic, we have to know that the battle on marijuana is a very expensive one. On the other way we have to know that the price of a unit of marijuana is $8.60 on the street while its cost of production is only $1.70. In a free market, a $7 profit for a unit of marijuana would not last for long.This would make that dealers dissapear.
On the other hand, in the social aspect, he thinks that our kids shouldnt grow with that freedom of doing what ever they wan`t.
In my opinion I think that the legalization is going to be something good to the economy but a very bad thing in the social aspect that is the most important thing.