The study only shows a relationship between the early users and lower levels of educational achievement, less productivity, less relationship potential, etc. It indicates that early use of drugs and alcohol causes these issues. I believe that the problems of lower levels of educational achievement, less productivity, less relationship potential, are an indication of a problem that is only being self treated by drug and alcohol abuse. I firmly believe that the problem or difficult children are constantly shoved aside in favor of the "easy" kids, because they take too much effort to educate and mold into effective, efficient, and fulfilled citizens. This leads these children into a self medicating lifestyle in order to deal with the disenfranchisement perpetrated upon them by parents and educators who simply do not have the energy and time to deal with these "problem" children. I am not placing blame, I do understand that these kids take an inordinate amount time and other resources to meet the same goals as the "easy" kids. Every human innately wants to maximize their efforts. It is something that equals survival in the real world. However, I believe the efforts will for the most part prove to be worthwhile due to the heightened levels of sensitivity and performance that a properly handled "problem child" can realize. Although there will most certainly not be a %100 success rate, the R.O.I in the success column will prove to be most rewarding. As a parent or educator, you should not rate yourself on the success, only on the effort. In the end it will still be up to the individual to make the most of any given situation.