According to the un charter, one of the four purposes of the un is to:

The UN  charter  has  four  main  purposes  which   include  the  following
1.Maintaining  peace  and  security all  over  the  world  and  hence  taking  collective  measure
2.developing  good  relationship  between  nations
3.Enhancing  cooperation  in solving  international  problems  which  may  be  in  economic,  social  or  cultural
4.To  be  a  center   of   harmonizing  action  of  nations  in  attainment  of  the  common  ends