If oil, tobacco, alcohol and drugs wouldn't exist. It would be tougher, but imagine the difference it would be.
If all countries in the world would have the same salaries and laws. And be one nation. If men and women would have the same opportunities in life, so women could stop complaining that they can't get good jobs (when they actually don't even try). End all racism (or make everybody in one color, maybe yellow, like the Simpsons). Ban all shows like Big Brother, The Bachelor and Survivor. Give some damned help to cure cancer, and other diseases like AIDS. Stop ruining the oceans and rainforests. Erase poverty and starvation. Give all the same opportunities, in all parts of the world.
that would do good to the world, not making weed grow on trees and ban cops, man that is stupid.