Because ending world hunger would take 10% of what is spent on arms. A world march for peace is being organized from October 2, 2009 until January 2, 2010 around the world.
I love these ads, they are so clever :)
In their website it says: The World March will begin in New Zealand on October 2, 2009, the anniversary of Gandhi’s birth, declared the “International Day of Nonviolence” by the United Nations. It will conclude in the Andes Mountains (Punta de Vacas, Aconcagua, Argentina) on January 2, 2010. The March will last 90 days, three long months of travel. It will pass through all climates and seasons, from the hot summer of the tropics and the deserts, to the winter of Siberia. The American and Asian stages will be the longest, both almost a month. A permanent base of a hundred people of different nationalities will complete the journey.
You can get more information here