Conversation so far:
What is significant about Manu Chao and his interview with the University of Southern California?
Manu Chao expressed his opinions about topics such as the effects of economic globalization on social inequality. He explained how he believes that the global market is causing social inequality.
How did people react to Manu Chao's opinion of economic globalization?
Are there any other interesting aspects about Manu Chao and his interview with the University of Southern California besides expressing his opinions about topics such as the effects of economic globalization on social inequality?
Interviewing by University of Southern California, Manu Chao expressed a worry that mafias are the greatest threat to democracy; this is already evident in certain places, like Russia and Mexico.
What is a Manu Chao's reasoning for legalizing marijuana?
Manu Chao explained that mafias are making capital off of the distribution of illegal drugs, giving them more economic power, thus making it easier for them to potentially overthrow governments.
Did Manu Chao say anything else in the interview with the University of Southern California that is note worthy besides believing the global market causes social inequality and that the distribution of illegal drugs gives mafia operations more economic power?
Manu Chao believes the most effective way to solve social problems in individual countries is to address them at a global level by changing the policies dictating the global market.

Question: Why does he think that?
Self-contained rewrite: Why does Manu Chao believe that the most effective way to solve social problems in individual countries is to address them at a global level?