Does international law work? In what situations is it most effective? In what situations is it least effective?

Answer 1

International law isn't very effective because there's not an effective police force to enforce it. An attempt to enforce international law leads to endless wars against rogue states and organizations.

In the past, international law was fairly effective with the Geneva Convention for prisoners of war and the ban on poison gas. However, they have still been used by countries that chose not to abide by these laws.