Papaumau
Man of the world
This idea....( although I voted against it ), - will explain why later on - is extremely well highlighted in Iraq at the moment.
The arab tribes have been at war with each-other for eons and these wars have generated many alliances and splits over this time.
At the moment they see the American/British infidels as a common foe and as such we see the warlords and the religious clerics forming alliances to defeat this common foe.
Of course as soon as the co-alition troops move out, ( even IF it is a so-called Democracy by this time ), the religious and greedy factions will immediately split once again so as to push their own agendas.
It is likely that civil-war will then ensure until the strongest prevail and the weakest fall.
SO...It seems that I have presented an argument AGAINST my own stance here...but actually, if we move away form the very unstable Middle East we will find that friendships in the main form more alliances than war and greed do.
As a humanist I would hope that this trend increases as the peoples of the world get sick and tired of war and bloodshed and hatred.