Learn all about international law and why it matters, with BBC Learning English.
Are all laws written down? Of course, many important treaties are written down, but there are also many ‘unwritten rules’ which govern how states relate to each other. This video explores both kinds.
0:00 Are laws written down?
0:18 What is a treaty?
0:35 ‘Unwritten rules’
0:55 What is ‘customary law’?