Sovereign state
There is no rule to say what exactly makes a state. Usually, the things a state must have are mainly political, not legal. The Czechs and the Poles were seen as separate states during World War I, even though they did not exist as states yet. L.C. Green explained this by saying that "recognition of statehood is a matter of discretion, it is open to any existing state to accept as a state any entity it wishes, regardless of the existence of territory or an established government."