...indeed, who will pull the trigger first. Greece is being forced to consider this possibility is real, so too the EU and all of Turkey's neighbours.
Erdogan knows very well that he can win in a war of public relations, just so long as he becomes the victim of some aggression. It is a very fine line he has drawn, and will be drawing when drillships begin their work in waters where Greece and Libya meet. The dogfights in the Aegean will be compounded with Naval demonstrations, relatively speaking at great cost to Greece.
She will have a lot of diplomatic support from other countries, she will also be under a lot of stress to get a deal done, (any deal). And yet,it is possible that these players will understand that the very foundations of their existence is at stake, not just a slice of Greece and Cyprus.
Unity, without a demonstration of action, as a unified body, what are Universal Principals worth? If the "Western World" leads, this solidarity is in effect demanded. With all the misery that there is in this region, such as it is, it is not sustainable. If there is a cost it is either War, or change; this is the position that Erdogan has taken: total supremacy or an equal.
I find it interesting that he was placed himself in Libya as the mirror opposite to Russia in Syria, being the welcome guest of the "legitimate" government.
...it will not be easy to get Erdogan to the table.