Everyone must have the alliance in their ally list. You can find the ally list by clicking the FB icon on the right side of the screen. You can add allys there, and get resources or send messages. Adding allys is very helpful and useful since you can get free resources by clicking on an ally and visit ther empires, where you can increase their production. In order to do this you must have a face book account. If you do not have one please create one, and send your FB E-mail to Cyrill.
You can always make a fake Facebook Profile, with your In-game name as first name and evony as last name.