Luxons believe that Might makes right, they take what they can by right of strength.
"We respect only strength!"
Luxon Peasant
Their sworn enemies, the Kurzicks, on the other hand, believe that War is no more than a waltz, a dance started by their ancestors, and they have to continue it, in honor of Balthazar.
"Perfection of skill, of creation, is the way to honor ones ancestors, the saints of old."
Kurzick Peasant
Both sides are fanatics, almost blind to reason, there is no doubt about that. Yet they both developed a philosophy to justify the war, to augment the ever-accepted argument "it´s tradition"...
"If the Kurzicks didn't want us taking their amber they would become stronger."
Luxon Peasant
Luxons clearly believe in strength - they travel the jade sea and mine raw jade, they take what they can get by their "right" of strength.
This attitude probably evolved through the hard life on "sea", solid as it may be, it yet houses numerous hazards.
They´ve split into separate groups, yet have retained a sense for the necessity of central government - they created a council of Elders, who can overrule decisions made by individual groups, and is called upon to settle disputes, to create new laws or modify existing ones, if necessary.
"We take what we can by right of strength."
Luxon peasant
"The Great War is the waltz of Balthazar.
Our ancestors created it so we continue the dance they began."
Kurzick Peasant
Kurzicks are weak in the eyes of the Luxons. They do not measure themselves by strength alone, they are creative, writing music and poetry, believe in the gods and see signs of them in all creation.
"Many of the younger generation want to create works to eclipse those of our ancestors."
Kurzick Child
Their young try to outperform their parents - but not with mere strength - they want to create even better music, better art, yet they also are willing to fight their hereditary enemies - the Luxons.
Unlike their enemies, the Kurzicks do not only believe in strength - quite the opposite.
Battle is a necessity, a way of life, but it is not all there is.
"Battle is the most magnificent of all the true gods' creations."
Kurzick Peasant
Where the Luxons have their council of Elders, the Kurzicks have a council of Nobles, who, before taking action, consult their spiritual superiors - the Redemtors.
Both sides have now come to Tyria, and brought their war with them.
Each side is blind to the terror they create, seeing only the complete annihilation of the other side as a possible goal.
Now YOU have to take sides. Wether you like it or not, you can only aid one side. No doubt, no matter how you decide - the repercussions will soon be revealed, when the sea route to Cantha is opened once more, when you will finally have to pledge alliance to either Kurzick or Luxon.
Does Might make Right? Or is War but a dance? YOU decide... 
"There is one last dark song all men must hear."
Kurzick Peasant
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Luxon or Kurzick - which one will you join? Both sides need new recruits - they´d like to have YOU on their side.