International agreements define the type of world we want to live in. They are the promises we keep to each other. Our commitments and their implementation underpin the international system and keep us safe.

The Chemical Weapons Convention is one of these, but there are worrying signs we have forgotten why we worked so hard to achieve this vital agreement.

Chemical weapons asphyxiate, choke, blister and poison. Even where not lethal, their effects can last a lifetime. During the 20th century they were used on and off the battlefield with horrific consequence. Read more