We don´t need revolution, we need improvement.
Revolutions are too drastic and are only necessary when a negative source poses resistance. But with democracy, globalization of ideals and the way media is allowing us to communicate, we have what it takes to move on into a balanced society where natural resources can be used wisely in accordance to new hiper-population needs.
To be more direct with your question, I would elect as world leaders not politicians but social engineering geniuses like Michio Kaku, for a quick example. People that know what´s needed for society development instead on how to be more popular and get more votes.
"The Venus Project" is something like what I envision. Check it out on youtube