Evaluate the valence intensity of the following sentence, considering the mental state of the author. Present a score between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Sentence: Their struggle to attain status in societies still bearing the marks of Spanish colonialism is deeply tied to their struggle to reaffirm the nature of their “indigenous identity”, and is in turn linked to the interaction of Spanish and their native languages.