He concluded, "You don't walk away from a treaty without a new system being in place."

There's nothing you can do about that, but without a special system the ice walls would have melted in no time.

Before then people couldn't imagine a world without a feudal system.

But it is difficult for the police to work without a legal system in place.

Without a strong immune system, the body has trouble fighting off disease.

The design also works without a cooling system, saving weight.

How in the world could a civilization develop and have any continuity without an economic system?

Without a system of progress evaluation the manager will not know until the end, whether he has succeeded.

No society can flourish without a fair system of justice.

However, without a functioning financial system, nothing else can be sustained.