the horrors of modern warfare have made man think about ways of preserving human life in1920the leage of nations was formed to keep international peace after worldn war 1 the league uf nation was abl to resolve some conflicts around the world but it could not oppose the rise of totalitarianism ingermany italy and japan .hitler and mussolini were able to start world war 2because the league of nations could do nouthing about it simply because it had not enough power of its own.the united nations replaced the league of nations in 1945 just after the end of world war 2.tody most of the world s independent nations are members and each has one vote in the general assembly every member state can refer its disputes with its neighbours to the united nations security council the un security council is the body of the united nations which can take political economic or military action to settle ivternational disputes it has 15 members five of which are permanet (britain china france the russin federation and the us)it can thus get member states to contribute contingents of soldiers from theire own armies to constitute a un task force .these soldiers calld blue helmets are entrusted with keeping peace in hot spots of the world .other agencies of the united nations include the food and agricutural organisation the world health organisation and the united nations international childeren emergency fund these un agencies co-operate in fighting disease and reducing poverty in the worldso far they have been able to stop killer diseases such as tuberculosis and smallpox they will hopefully be able to eradicate other diseases and famine soon