Probably not; through history, there have been very few openly atheist head of state. You might be able to argue that under Soviet and Chinese communism, some religions have been persecuted by an atheist government.
Probably, the most basic answer anyone can give, is because humans exist. While humans are alive, wars will happen.
No
It was based on the films Star Wars.
No
If you mean Lego Star Wars 3 The Clone Wars, then anyone who has the game
Yes anyone can play Mafia Wars. It is a public game that anyone can play; even plumbers, artists and students can play.
Besides his squad mates no.
No.
1,2,3,5,7 are and 4,7 are partly based
your Mafia Wars whenever you are in the fight mode. you can see your status and your Mafia Wars ID when you attack anyone.
Atheism, being the absense of belief, doesn't have a great impact - rationalism has had a far greater impact. Even in theocracies, governments usually have to rationalise decisions. If you look back to before the 17th Century, European monarchs believed they ruled by divine right - wars would be fought for religious reasons. Of course, you might argue that wars are still fought for religious reasons, but not quite so much.
lego star wars for 3ds is based on the clone wars.