Longbeards are the oldest and most experienced of the Dwarf warriors, a fact evident of their long beards. They ensure that they receive complete respect from other dwarfs, who are taught quite rightly to respect their elders.
It reminded me of Lord of the Rings history of long long ago. Putting a end to all the wrong ways of past. Unlikely allies and everyone coming together for a great future. Good ideas, better to get it right and find truths.