Barbarian Ethos

Across Creation those who proudly claim the title of "Barbarian" share a core set of ideals, though there are local and individual variations.
Above all things, barbarians value strength, honour, and passion.
Strength is what allows a barbarian to stand alone, unbowed by the strange forces abroad in the land. Nowhere is always safe, and a true barbarian must be ready.
Honour is what allows strong individuals to braid their strength together to form a tribe, it means a hunting party can overcome a claw-strider together when one holding back would have a better chance to live and all holding back would only die each in turn.
Passion is what makes life worth living, embracing fully the joy or rage or sorrow of the moment. Unlike the grey sameness of a civilisation smothered by rules, the barbarians revel in the colour and immediate gratification of following their heart.
Shouting honest disagreement at your Chief across the council fire, or killing a rival in a duel is strong and honourable and passionate. Honeyed lies to sway the clan or knifing a rival as they sleep is none of those things. Of course, like all cultures amongst the barbarians are many who fail to live up to their ideals.

While they may be stronger together, every barbarian must be ready to stand alone. They have no warrior class, every tribe member is ready to fight, they have no artisan class, every adult is expected to know how to, for example, spin thread and tan leather, and of course they have no farmer class (no farmers for that matter) though each barbarian must be able to find their own food. The perfect barbarian can defeat any foe with axe in hand, find their way through the tribes territory by singing along the Songlines and survive disaster thanks to the Walkway charm they crafted.

What tribes cannot make for themselves they raid for, or trade if they must.

Variations

What is strength? Is it only physical might, or could cunning be strength? What about speed, or experience, or heavy armour, or is it anyway to meet a challenge?

To whom do you owe honour? Do you owe it to yourself to treat everyone honourably, or are only barbarians due honourable behaviour. Or is it more limited? Only your tribe, your clan, your family or those you're sworn binding pacts with? Is every word spoken true and promise kept, or do only formal oaths count? Or something between?

Are all passions good, or can there be a bad passion? If so, how do you deal with them? Should all passions be openly displayed, or are there times or types of emotion that should be concealed behind a stoic exterior and embraced later, perhaps in a ceremony?