CCC 2439
Life in Christ›SECTION TWO THE TEN COMMANDMENTS›CHAPTER TWO YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF›V. Justice and Solidarity Among Nations
Rich nations have a grave moral responsibility toward those which are unable to ensure the means of their development by themselves or have been prevented from doing so by tragic historical events. It is a duty in solidarity and charity; it is also an obligation in justice if the prosperity of the rich nations has come from resources that have not been paid for fairly.