one word [driven]
(ref: here ) Lashing out, the frumius wallaby rode itself to death; finding only solace in the quiet calm of the forest, its dreams of hope and anger were swallowed up. Mason, simplest of the farmers, found the wallaby the following day; covered in bits of black insects and curiously blue frimbles; it had a disctive odor. Recognizing the odor, Mason, ran from the corpse. It was too late. His family, too recognizing the frothing and angry gesticulating, had only one recourse - and Mason was forever bound to live outside the confines of his village. Deeply saddened, Mason began his quest; head held high, Mason left off his family, his lineage, his culture, and began anew. And his children, ignoring the village rules, followed.