The principal reason why (แก้ไข reason) developed nations should help is that we now live in a global village and it is no longer possible to ignore what happens on the other side of the world. This is partly a moral issue and partly because it is in the economic self-interest of industrialised nations to ensure that developing nations continue to progress. A practical way of achieving this would be to accept more immigration, particularly when it is caused by natural disasters or civil war.