Background
At a young age Itus grew restless with life on Ithor. Life on the Herd Ship never sat well with him. He considered answering the call of the Mother Jungle, though deep down he knew a life retreating from the problems of the Galaxy would never be satisfying.
The logical choice was to leave home; "He could always come back," he told himself. Brucks made his way with little direction, sticking primarily to rural and developing planets where he could work in the natural environment. He's helped where he could; built some bridges and blown up a few along the way.
After hearing news and contemplating the Battle of Yavin, Brucks resolved to join the Rebel Alliance.
Motivation
Belief-Progress
Misappropriation of resources by the Empire and Elite individuals on both sides of the table causes great suffering galaxy wide. The Empire is systematically abusive in it's control of resources. Usurping their power offers many opportunities for making a large dent in redistributing resources.