Drug legalization would be good thing on developed countries. Lets say you have a chance on Asian countries to legaliza drugs, can you imagine the whole process?
Many of the developed nations have already legalized soft drugs. It has been hugely beneficial, by cutting down the drug-related crime, increasing the tax revenue, and creating more jobs. The developing countries (especially those in Asia) can also try the same. Not just drugs, but prostitution also must be legalized.
This will not lead to anything good. Thus, society only degrades. It is necessary to adopt laws that are more useful for the society that will transfer it to a new level of development.