The five global leaders he discussed were former US Vice-President Al Gore, Nobel Laureate Wangari Maathai, US President Barack Obama, former UN Secretary General Kofi Annan, former Cuban President Fidel Castro. 
Viongozi watano wa kidunia aliowajadili walikuwa Makamu wa Rais wa zamani wa Marekani Al Gore, Mshindi wa Tuzo ya Nobeli Wangari Maathai, Rais wa Marekani Barack Obama, Katibu Mkuu wa zamani wa Umoja wa Mataifa Kofi Annan, Rais wa zamani wa Cuba Fidel Castro.