"Those of us who still cling to a belief that the actions of democratic countries should be driven by adherence to and promotion of fundamental humanitarian principles have looked on in despair at the impotence of world leaders, which has at times verged on complicity in Israel's and the US's actions."
Former Prime Minister Theresa May argues that today's international leaders fail to adequately confront modern slavery, which she labels one of the greatest human rights crises facing the world today.