What next? Well, it depends.

Quite often, nothing happens at all.

Pursuing justice takes time and money,

but sometimes things do happen.

Let's imagine you're a state that invades another.

You've broken one of the most fundamental international laws

and committed the crime of aggression.

You can expect sanctions

or maybe even military intervention.

Now, let's say you're an individual

who's committed a war crime.

You personally might be tried at an international court:

this can take decades and requires the help of your own country.

And what if you're an energy company

that has spilled oil in the sea around another country?

Then this might be a case for private international law

and your company could face fines and punishment.

International laws are sometimes broken

because of the problem of effectively enforcing them,

but they're there to guide us

for when things do go wrong.