Humanity is faced with global challenges that require collective responses. The United Nations is the key arena to make this happen. This report published on behalf of the international Campaign for a UN World Citizens' Initiative recommends that the UN should strengthen its democratic legitimacy and its connection to global citizens by enabling them to put proposals on the UN's agenda if they mobilize sufficient support from across the world. The instrument to implement this idea is a World Citizens' Initiative. This legal study explores in detail how this could work. The time has come to realize the promise of the UN Charter which begins with the words, "We the Peoples of the United Nations". Proceeds from the sale of the hardcopy version of this brochure are used to support the Campaign for a UN World Citizens' Initiative. For a free download and more information on the campaign visit www.worldcitizensinitiative.org.