Sentence:  In selecting Bran Stark, the lords of Westeros are choosing to value these stories and memories above whatever other qualities might make a good ruler, and more specifically, put an end to the <WSD>caprices</WSD> of heritage that have allowed bloodlines to wreak havoc on good stewardship of these kingdoms. 
Meaning of the word marked with <WSD> tags:  A disposition to be impulsive.